Open the laptop and disconnect the [https://www.amazon.com/Harness-Connector-50-R2GN2-001-E1-521-11204G32MNK-E1-521-0865/dp/B014IHU262|DC-In cable] from the motherboard and then use an Ohmmeter to check for continuity between the jack and the cable connector tied to it.
It is not uncommon for the jack to fail internally, usually the centre pin connection breaks off. If it is faulty it cannot be repaired, it has to be replaced
=== Update (02/14/2020) ===
Hi @enricorox ,
That shows that there is a -ve voltage on the centre connector of the plug
There should be no -ve symbol with the measurement with the leads connected as they are.
Is the adapter the original one that came with the laptop?
Here’s an image taken from this [https://www.laptopchargerfactory.com/acer-aspire-laptop-charger/aspire-e1521|link] for an adapter for an Acer E1-521.
It shows that the DC output is +ve in the centre of the plug and -ve on the outside of the plug.
Does your adapter show the same symbol for the output?
[image|2004732]
(click on image to enlarge for better viewing).
Does the other adapter you tried ( ''“9. replace the power adapter: nothing… “)'' show the voltage correctly i.e. 19V DC and not -19V DC when measured the same way?
If so then perhaps the laptop doesn’t have reverse voltage protection and the input circuit has been damaged.
Try searching online for a schematic of the motherboard. Search for ''(Insert motherboard’s “board” number) schematic'' and check if there’s one available that will help to find the components on the board that may have been damaged
=== Update (02/15/2020) ===
Hi @enricorox ,
It may be that there is no difference between the motherboard Revisions as far as this part of the circuit is concerned. Worth a look anyway.
It’s a bit too complicated for me too but maybe you can check if there are components PQ6, PQ7 PQ8, PQ10, PQ14A & PQ14B around the VIN point as shown in the circuit. If so perhaps they may show signs of physical damage
-
Components usually show a reading of some sort when using an Ohmmeter (reverse the leads and test ‘both ways”) so if any are testing either a dead short circuit or an open circuit they may be suspect. Take them out of circuit by unsoldering them and test them again Don’t forget to disconnect the battery from the motherboard when testing with an Ohmmeter;-)
+
Components usually show a reading of some sort when using an Ohmmeter (reverse the leads and test ‘both ways”) so if any are testing either a dead short circuit or an open circuit they may be suspect. Take them out of circuit by unsoldering them and test them again out of circuit. Don’t forget to disconnect the battery from the motherboard when testing with an Ohmmeter;-)
Here’s the part of the circuit that I’m talking about, although you’ve probably already been here.
Open the laptop and disconnect the [https://www.amazon.com/Harness-Connector-50-R2GN2-001-E1-521-11204G32MNK-E1-521-0865/dp/B014IHU262|DC-In cable] from the motherboard and then use an Ohmmeter to check for continuity between the jack and the cable connector tied to it.
It is not uncommon for the jack to fail internally, usually the centre pin connection breaks off. If it is faulty it cannot be repaired, it has to be replaced
=== Update (02/14/2020) ===
Hi @enricorox ,
That shows that there is a -ve voltage on the centre connector of the plug
There should be no -ve symbol with the measurement with the leads connected as they are.
Is the adapter the original one that came with the laptop?
Here’s an image taken from this [https://www.laptopchargerfactory.com/acer-aspire-laptop-charger/aspire-e1521|link] for an adapter for an Acer E1-521.
It shows that the DC output is +ve in the centre of the plug and -ve on the outside of the plug.
Does your adapter show the same symbol for the output?
[image|2004732]
(click on image to enlarge for better viewing).
Does the other adapter you tried ( ''“9. replace the power adapter: nothing… “)'' show the voltage correctly i.e. 19V DC and not -19V DC when measured the same way?
If so then perhaps the laptop doesn’t have reverse voltage protection and the input circuit has been damaged.
Try searching online for a schematic of the motherboard. Search for ''(Insert motherboard’s “board” number) schematic'' and check if there’s one available that will help to find the components on the board that may have been damaged
=== Update (02/15/2020) ===
Hi @enricorox ,
It may be that there is no difference between the motherboard Revisions as far as this part of the circuit is concerned. Worth a look anyway.
It’s a bit too complicated for me too but maybe you can check if there are components PQ6, PQ7 PQ8, PQ10, PQ14A & PQ14B around the VIN point as shown in the circuit. If so perhaps they may show signs of physical damage
-
Components usually show a reading of some sort when using an Ohmmeter (reverse the leads and test ‘both ways”) so if any are testing either a dead short circuit or an open circuit they may be suspect. Take them out of circuit by unsoldering them and test again Don’t forget to disconnect the battery from the motherboard when testing with an Ohmmeter;-)
+
Components usually show a reading of some sort when using an Ohmmeter (reverse the leads and test ‘both ways”) so if any are testing either a dead short circuit or an open circuit they may be suspect. Take them out of circuit by unsoldering them and test them again Don’t forget to disconnect the battery from the motherboard when testing with an Ohmmeter;-)
Here’s the part of the circuit that I’m talking about, although you’ve probably already been here.
Open the laptop and disconnect the [https://www.amazon.com/Harness-Connector-50-R2GN2-001-E1-521-11204G32MNK-E1-521-0865/dp/B014IHU262|DC-In cable] from the motherboard and then use an Ohmmeter to check for continuity between the jack and the cable connector tied to it.
It is not uncommon for the jack to fail internally, usually the centre pin connection breaks off. If it is faulty it cannot be repaired, it has to be replaced
=== Update (02/14/2020) ===
Hi @enricorox ,
That shows that there is a -ve voltage on the centre connector of the plug
There should be no -ve symbol with the measurement with the leads connected as they are.
Is the adapter the original one that came with the laptop?
Here’s an image taken from this [https://www.laptopchargerfactory.com/acer-aspire-laptop-charger/aspire-e1521|link] for an adapter for an Acer E1-521.
It shows that the DC output is +ve in the centre of the plug and -ve on the outside of the plug.
Does your adapter show the same symbol for the output?
[image|2004732]
(click on image to enlarge for better viewing).
Does the other adapter you tried ( ''“9. replace the power adapter: nothing… “)'' show the voltage correctly i.e. 19V DC and not -19V DC when measured the same way?
If so then perhaps the laptop doesn’t have reverse voltage protection and the input circuit has been damaged.
Try searching online for a schematic of the motherboard. Search for ''(Insert motherboard’s “board” number) schematic'' and check if there’s one available that will help to find the components on the board that may have been damaged
=== Update (02/15/2020) ===
Hi @enricorox ,
It may be that there is no difference between the motherboard Revisions as far as this part of the circuit is concerned. Worth a look anyway.
-
It’s a bit too complicated for me too but maybe you can check the components PQ6, PQ7 PQ8, PQ10, PQ14A & PQ14B around the VIN point as shown in the circuit. Perhaps they may show signs of physical damage
+
It’s a bit too complicated for me too but maybe you can check if there are components PQ6, PQ7 PQ8, PQ10, PQ14A & PQ14B around the VIN point as shown in the circuit. If so perhaps they may show signs of physical damage
Components usually show a reading of some sort when using an Ohmmeter (reverse the leads and test ‘both ways”) so if any are testing either a dead short circuit or an open circuit they may be suspect. Take them out of circuit by unsoldering them and test again Don’t forget to disconnect the battery from the motherboard when testing with an Ohmmeter;-)
Here’s the part of the circuit that I’m talking about, although you’ve probably already been here.
Open the laptop and disconnect the [https://www.amazon.com/Harness-Connector-50-R2GN2-001-E1-521-11204G32MNK-E1-521-0865/dp/B014IHU262|DC-In cable] from the motherboard and then use an Ohmmeter to check for continuity between the jack and the cable connector tied to it.
It is not uncommon for the jack to fail internally, usually the centre pin connection breaks off. If it is faulty it cannot be repaired, it has to be replaced
=== Update (02/14/2020) ===
Hi @enricorox ,
That shows that there is a -ve voltage on the centre connector of the plug
There should be no -ve symbol with the measurement with the leads connected as they are.
Is the adapter the original one that came with the laptop?
Here’s an image taken from this [https://www.laptopchargerfactory.com/acer-aspire-laptop-charger/aspire-e1521|link] for an adapter for an Acer E1-521.
It shows that the DC output is +ve in the centre of the plug and -ve on the outside of the plug.
Does your adapter show the same symbol for the output?
[image|2004732]
(click on image to enlarge for better viewing).
Does the other adapter you tried ( ''“9. replace the power adapter: nothing… “)'' show the voltage correctly i.e. 19V DC and not -19V DC when measured the same way?
If so then perhaps the laptop doesn’t have reverse voltage protection and the input circuit has been damaged.
Try searching online for a schematic of the motherboard. Search for ''(Insert motherboard’s “board” number) schematic'' and check if there’s one available that will help to find the components on the board that may have been damaged
=== Update (02/15/2020) ===
Hi @enricorox ,
It may be that there is no difference between the motherboard Revisions as far as this part of the circuit is concerned. Worth a look anyway.
It’s a bit too complicated for me too but maybe you can check the components PQ6, PQ7 PQ8, PQ10, PQ14A & PQ14B around the VIN point as shown in the circuit. Perhaps they may show signs of physical damage
-
-
-
Components usually show a reading of some sort when using an Ohmmeter (reverse the leads and test ‘both ways”) so if any are testing either a dead short circuit or an open circuit they may be suspect. Don’t forget to disconnect the battery from the motherboard when testing with an Ohmmeter;-)
+
Components usually show a reading of some sort when using an Ohmmeter (reverse the leads and test ‘both ways”) so if any are testing either a dead short circuit or an open circuit they may be suspect. Take them out of circuit by unsoldering them and test again Don’t forget to disconnect the battery from the motherboard when testing with an Ohmmeter;-)
Here’s the part of the circuit that I’m talking about, although you’ve probably already been here.
Open the laptop and disconnect the [https://www.amazon.com/Harness-Connector-50-R2GN2-001-E1-521-11204G32MNK-E1-521-0865/dp/B014IHU262|DC-In cable] from the motherboard and then use an Ohmmeter to check for continuity between the jack and the cable connector tied to it.
It is not uncommon for the jack to fail internally, usually the centre pin connection breaks off. If it is faulty it cannot be repaired, it has to be replaced
=== Update (02/14/2020) ===
Hi @enricorox ,
That shows that there is a -ve voltage on the centre connector of the plug
There should be no -ve symbol with the measurement with the leads connected as they are.
Is the adapter the original one that came with the laptop?
Here’s an image taken from this [https://www.laptopchargerfactory.com/acer-aspire-laptop-charger/aspire-e1521|link] for an adapter for an Acer E1-521.
It shows that the DC output is +ve in the centre of the plug and -ve on the outside of the plug.
Does your adapter show the same symbol for the output?
[image|2004732]
(click on image to enlarge for better viewing).
Does the other adapter you tried ( ''“9. replace the power adapter: nothing… “)'' show the voltage correctly i.e. 19V DC and not -19V DC when measured the same way?
If so then perhaps the laptop doesn’t have reverse voltage protection and the input circuit has been damaged.
Try searching online for a schematic of the motherboard. Search for ''(Insert motherboard’s “board” number) schematic'' and check if there’s one available that will help to find the components on the board that may have been damaged
+
+
=== Update (02/15/2020) ===
+
Hi @enricorox ,
+
+
It may be that there is no difference between the motherboard Revisions as far as this part of the circuit is concerned. Worth a look anyway.
+
+
It’s a bit too complicated for me too but maybe you can check the components PQ6, PQ7 PQ8, PQ10, PQ14A & PQ14B around the VIN point as shown in the circuit. Perhaps they may show signs of physical damage
+
+
+
+
Components usually show a reading of some sort when using an Ohmmeter (reverse the leads and test ‘both ways”) so if any are testing either a dead short circuit or an open circuit they may be suspect. Don’t forget to disconnect the battery from the motherboard when testing with an Ohmmeter;-)
+
+
Here’s the part of the circuit that I’m talking about, although you’ve probably already been here.
Open the laptop and disconnect the [https://www.amazon.com/Harness-Connector-50-R2GN2-001-E1-521-11204G32MNK-E1-521-0865/dp/B014IHU262|DC-In cable] from the motherboard and then use an Ohmmeter to check for continuity between the jack and the cable connector tied to it.
It is not uncommon for the jack to fail internally, usually the centre pin connection breaks off. If it is faulty it cannot be repaired, it has to be replaced
=== Update (02/14/2020) ===
Hi @enricorox ,
That shows that there is a -ve voltage on the centre connector of the plug
There should be no -ve symbol with the measurement with the leads connected as they are.
Is the adapter the original one that came with the laptop?
Here’s an image taken from this [https://www.laptopchargerfactory.com/acer-aspire-laptop-charger/aspire-e1521|link] for an adapter for an Acer E1-521.
It shows that the DC output is +ve in the centre of the plug and -ve on the outside of the plug.
Does your adapter show the same symbol for the output?
[image|2004732]
(click on image to enlarge for better viewing).
Does the other adapter you tried ( ''“9. replace the power adapter: nothing… “)'' show the voltage correctly i.e. 19V DC and not -19V DC when measured the same way?
If so then perhaps the laptop doesn’t have reverse voltage protection and the input circuit has been damaged.
-
Try searching online for a schematic of the motherboard. Search for ''(Insert motherboard “board” number) schematic'' and check if there’s one available that will help to find the components on the board that may have been damaged
+
Try searching online for a schematic of the motherboard. Search for ''(Insert motherboard’s “board” number) schematic'' and check if there’s one available that will help to find the components on the board that may have been damaged
Open the laptop and disconnect the [https://www.amazon.com/Harness-Connector-50-R2GN2-001-E1-521-11204G32MNK-E1-521-0865/dp/B014IHU262|DC-In cable] from the motherboard and then use an Ohmmeter to check for continuity between the jack and the cable connector tied to it.
It is not uncommon for the jack to fail internally, usually the centre pin connection breaks off. If it is faulty it cannot be repaired, it has to be replaced
=== Update (02/14/2020) ===
Hi @enricorox ,
That shows that there is a -ve voltage on the centre connector of the plug
There should be no -ve symbol with the measurement with the leads connected as they are.
Is the adapter the original one that came with the laptop?
Here’s an image taken from this [https://www.laptopchargerfactory.com/acer-aspire-laptop-charger/aspire-e1521|link] for an adapter for an Acer E1-521.
It shows that the DC output is +ve in the centre of the plug and -ve on the outside of the plug.
Does your adapter show the same symbol for the output?
[image|2004732]
(click on image to enlarge for better viewing).
Does the other adapter you tried ( ''“9. replace the power adapter: nothing… “)'' show the voltage correctly i.e. 19V DC and not -19V DC when measured the same way?
If so then perhaps the laptop doesn’t have reverse voltage protection and the input circuit has been damaged.
-
Try searching online for a schematic of the motherboard. Search for ''(Insert motherboard board number) schematic'' and check if there’s one available that will help to find the components on the board that may have been damaged
+
Try searching online for a schematic of the motherboard. Search for ''(Insert motherboard “board” number) schematic'' and check if there’s one available that will help to find the components on the board that may have been damaged
Open the laptop and disconnect the [https://www.amazon.com/Harness-Connector-50-R2GN2-001-E1-521-11204G32MNK-E1-521-0865/dp/B014IHU262|DC-In cable] from the motherboard and then use an Ohmmeter to check for continuity between the jack and the cable connector tied to it.
It is not uncommon for the jack to fail internally, usually the centre pin connection breaks off. If it is faulty it cannot be repaired, it has to be replaced
=== Update (02/14/2020) ===
Hi @enricorox ,
-
That doesn’t look correct.
+
That shows that there is a -ve voltage on the centre connector of the plug
-
There should be no -ve symbol with the measurement.
+
There should be no -ve symbol with the measurement with the leads connected as they are.
Is the adapter the original one that came with the laptop?
Here’s an image taken from this [https://www.laptopchargerfactory.com/acer-aspire-laptop-charger/aspire-e1521|link] for an adapter for an Acer E1-521.
It shows that the DC output is +ve in the centre of the plug and -ve on the outside of the plug.
Does your adapter show the same symbol for the output?
[image|2004732]
(click on image to enlarge for better viewing).
Does the other adapter you tried ( ''“9. replace the power adapter: nothing… “)'' show the voltage correctly i.e. 19V DC and not -19V DC when measured the same way?
If so then perhaps the laptop doesn’t have reverse voltage protection and the input circuit has been damaged.
Try searching online for a schematic of the motherboard. Search for ''(Insert motherboard board number) schematic'' and check if there’s one available that will help to find the components on the board that may have been damaged
Open the laptop and disconnect the [https://www.amazon.com/Harness-Connector-50-R2GN2-001-E1-521-11204G32MNK-E1-521-0865/dp/B014IHU262|DC-In cable] from the motherboard and then use an Ohmmeter to check for continuity between the jack and the cable connector tied to it.
It is not uncommon for the jack to fail internally, usually the centre pin connection breaks off. If it is faulty it cannot be repaired, it has to be replaced
+
+
=== Update (02/14/2020) ===
+
Hi @enricorox ,
+
+
That doesn’t look correct.
+
+
There should be no -ve symbol with the measurement.
+
+
Is the adapter the original one that came with the laptop?
+
+
Here’s an image taken from this [https://www.laptopchargerfactory.com/acer-aspire-laptop-charger/aspire-e1521|link] for an adapter for an Acer E1-521.
+
+
It shows that the DC output is +ve in the centre of the plug and -ve on the outside of the plug.
+
+
Does your adapter show the same symbol for the output?
+
+
[image|2004732]
+
+
(click on image to enlarge for better viewing).
+
+
Does the other adapter you tried ( ''“9. replace the power adapter: nothing… “)'' show the voltage correctly i.e. 19V DC and not -19V DC when measured the same way?
+
+
If so then perhaps the laptop doesn’t have reverse voltage protection and the input circuit has been damaged.
+
+
Try searching online for a schematic of the motherboard. Search for ''(Insert motherboard board number) schematic'' and check if there’s one available that will help to find the components on the board that may have been damaged
Open the laptop and disconnect the [https://www.amazon.com/Harness-Connector-50-R2GN2-001-E1-521-11204G32MNK-E1-521-0865/dp/B014IHU262|DC-In cable] from the motherboard and then use an Ohmmeter to check for continuity between the jack and the cable connector tied to it.
-
It is not uncommon for the jack to fail internally.
+
It is not uncommon for the jack to fail internally, usually the centre pin connection breaks off. If it is faulty it cannot be repaired, it has to be replaced
Open the laptop and disconnect the [https://www.amazon.com/Harness-Connector-50-R2GN2-001-E1-521-11204G32MNK-E1-521-0865/dp/B014IHU262|DC-In cable] from the motherboard and then use an Ohmmeter to check for continuity between the lack and the cable connector tied to it.
+
Open the laptop and disconnect the [https://www.amazon.com/Harness-Connector-50-R2GN2-001-E1-521-11204G32MNK-E1-521-0865/dp/B014IHU262|DC-In cable] from the motherboard and then use an Ohmmeter to check for continuity between the jack and the cable connector tied to it.
It is not uncommon for the jack to fail internally.
Hi @enricorox ,
Open the laptop and disconnect the [https://www.amazon.com/Harness-Connector-50-R2GN2-001-E1-521-11204G32MNK-E1-521-0865/dp/B014IHU262|DC-In cable] from the motherboard and then use an Ohmmeter to check for continuity between the lack and the cable connector tied to it.
It is not uncommon for the jack to fail internally.