Perigo
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Perigo

Introdução

If your AL2216W is having problems, it is very likely that it is a capacitor issue. Here are some signs of bad capacitors:

Note: While some issues may be corrected with a partial capacitor replacement, this is not recommended. I is better to change all of the caps at the same time to avoid having to repair the same issue multiple times.

  • Power issues (This monitor has this issue)
  • Excessive transformer hum (This monitor has this issue)
  • Excessive inverter hum (This monitor has this issue)
  • Troublesome Auto adjustment (This monitor has this issue)
  • Backlight problems
  • Power problems
  • Video issues (Examples: Unstable image, Image drops when connected to a computer, does not play nice on higher resolutions, random image drops)
  • Random power issues that may only resolve if the monitor is physically unplugged.

Original capacitor values (Only use these if you do not want to install better caps then the monitor came with)

  • 25V 1000uF (x2)
  • 10V 1000uF (x1)
  • 25V 220uF (x2)
  • 16V 2200uF (Used on the inverter side of older power supplies)
  1. If you are uncertain about holding high voltage parts, follow all provided warnings and use common sense. A capacitor discharge tool is STRONGLY RECOMMENDED.
    • If you are uncertain about holding high voltage parts, follow all provided warnings and use common sense. A capacitor discharge tool is STRONGLY RECOMMENDED.

    • The filter capacitor will hold the most residual charge. Use caution around this capacitor!

    • Unplug the monitor and leave it unplugged for 24-48 hours. Wait 5-7 days if you intend to replace the filter capacitor.

  2. This monitor never came with a hinge cap. If yours has one, snap it off from the marked points. Remove the stand from the monitor. The 4 screws that have to be removed are marked. The bottom screws should be removed first, but this can be done in any order.
    • This monitor never came with a hinge cap. If yours has one, snap it off from the marked points.

    • Remove the stand from the monitor. The 4 screws that have to be removed are marked. The bottom screws should be removed first, but this can be done in any order.

  3. Remove 4 fine threaded screws from the back of the monitor. All of these screws are the same type and length. This screw is unique and only goes in one place as the thread is different. Set it aside separately from the other screws.
    • Remove 4 fine threaded screws from the back of the monitor. All of these screws are the same type and length.

    • This screw is unique and only goes in one place as the thread is different. Set it aside separately from the other screws.

  4. If the monitor has never been serviced, additional force may be required. However, using too much will do more harm then good. On the bottom of the monitor, there are four slots to open the monitor. To release these clips, use a Jimmy or flathead screwdriver. Warning: A flathead screwdriver will damage the plastic.
    • If the monitor has never been serviced, additional force may be required. However, using too much will do more harm then good.

    • On the bottom of the monitor, there are four slots to open the monitor. To release these clips, use a Jimmy or flathead screwdriver. Warning: A flathead screwdriver will damage the plastic.

  5. If you are having trouble doing this, a pry tool can help. This issue is more likely to come up a monitor that has never been opened.
    • If you are having trouble doing this, a pry tool can help. This issue is more likely to come up a monitor that has never been opened.

    • With the monitor unclipped on the bottom, pull the sides of the monitor up. Do this slowly to avoid damaging the plastics and LCD panel.

  6. After these screws are removed, the power supply will be exposed.
    • After these screws are removed, the power supply will be exposed.

    • With the back of the monitor off, remove the 2 screws on the IEC power connector.

  7. If you do not have a nut driver on hand, needlenoose plyers can also be used.
    • If you do not have a nut driver on hand, needlenoose plyers can also be used.

    • Remove the 4 screw pins for the video cables from the monitor. Use a 5mm Nut bit/driver to remove the screw pins from the power supply shield.

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  9. Disconnect the CCFL tube cables from the power supply board. Disconnect the CCFL tube cables from the power supply board.
    • Disconnect the CCFL tube cables from the power supply board.

  10. The board does not interfere with disassembly and can be left alone. Disconnect the flat flex cable that goes to the control board.
    • The board does not interfere with disassembly and can be left alone.

    • Disconnect the flat flex cable that goes to the control board.

  11. Remove the 2 bottom screws that hold the power supply shield to the monitor. Remove the 2 bottom screws that hold the power supply shield to the monitor.
    • Remove the 2 bottom screws that hold the power supply shield to the monitor.

  12. On the right side of the monitor, remove the remaining screws holding the upper shield in place. Lift the lower plate up while removing the power supply shield to remove it from the monitor. Once this is done, you will have access to the power supply. Removal of the lower shield is not required. However, it will make disassembly easier. If you choose to remove it, unclip the plastic tabs on the LCD bezel.
    • On the right side of the monitor, remove the remaining screws holding the upper shield in place.

    • Lift the lower plate up while removing the power supply shield to remove it from the monitor. Once this is done, you will have access to the power supply.

    • Removal of the lower shield is not required. However, it will make disassembly easier. If you choose to remove it, unclip the plastic tabs on the LCD bezel.

  13. If you see bulged capacitors, treat the power supply as if the capacitors are holding a residual charge. In most cases, the filter capacitor is okay. It MUST be discharged if being replaced. The black screw (marked in Blue) is a ground screw and only fits here. DO NOT LOSE IT.
    • If you see bulged capacitors, treat the power supply as if the capacitors are holding a residual charge.

    • In most cases, the filter capacitor is okay. It MUST be discharged if being replaced.

    • The black screw (marked in Blue) is a ground screw and only fits here. DO NOT LOSE IT.

    • Only lift the power supply board at a slight angle. Lifting it any more then this could result in pin or video processing board damage.

    • If you cannot find the original capacitors, it is safe to substitute for greater value parts. It is not necessary to match the capacitors used by the factory.

    • This capacitor is only used on older power supply boards. If your board has this capacitor, replacement is recommended, but not required unless there is obvious bulging or leakage.

    • With the power supply shield removed from the monitor, identify the power supply. Along with the capacitors previously mentioned, take note of any additional capacitors that were not mentioned (Ex: inverter coil).

    • Remove the 4 screws from the power supply. Once this is done, lift the power supply up at a slight angle to clear the mounting holes on the monitor chassis for removal.

  14. If the PCB is marked to avoid mis-installation, these marks will come off when exposed to solder flux.
    • If the PCB is marked to avoid mis-installation, these marks will come off when exposed to solder flux.

    • If you are unsure of the position of the capacitors, take a note of the polarity on the PCB with permanent marker. If the capacitors are installed incorrectly, they will explode when the monitor is powered on.

  15. If you do not have flux on hand, add solder to get flux on the board. The flux will be more difficult to clean if too much is used.
    • If you do not have flux on hand, add solder to get flux on the board. The flux will be more difficult to clean if too much is used.

    • To prepare the board for capacitor replacement, put flux or solder on the existing capacitors. This will make removal easier.

  16. If you do not have Helping Hands on hand, be careful not to touch the tip of your soldering iron. It may help to hold the board at an angle in this scenario. While it may be possible to do a partial capacitor replacement, the remaining capacitors will also fail. It's best to do all of them at once. If you do not know how to solder, refer to this guide: Como soldar e dessoldar contatos. Move in a workspace with ventilation or use a fume extractor. Once in an appropriate workspace, desolder the old capacitors. Heat one leg up and remove the capacitor. Do this for both legs.
    • If you do not have Helping Hands on hand, be careful not to touch the tip of your soldering iron. It may help to hold the board at an angle in this scenario.

    • While it may be possible to do a partial capacitor replacement, the remaining capacitors will also fail. It's best to do all of them at once. If you do not know how to solder, refer to this guide: Como soldar e dessoldar contatos.

    • Move in a workspace with ventilation or use a fume extractor. Once in an appropriate workspace, desolder the old capacitors. Heat one leg up and remove the capacitor. Do this for both legs.

    • After removing the capacitors, clean up the old solder. To do this, take a desoldering braid and clean up the solder from the pads. The desoldering braid must be lifted up with your soldering iron.

  17. Check the capacitor polarity before soldering the new capacitors in. If they are installed incorrectly, they will explode when powered.
    • Check the capacitor polarity before soldering the new capacitors in. If they are installed incorrectly, they will explode when powered.

    • Install new capacitors. Put the corresponding capacitor you are installing in the correct hole. Bend the leads to keep the capacitor from coming out.

  18. Once the polarity is verified, solder the capacitors in. Once soldered, cut the excess lead. Do this for all of the capacitors. Once the polarity is verified, solder the capacitors in. Once soldered, cut the excess lead. Do this for all of the capacitors. Once the polarity is verified, solder the capacitors in. Once soldered, cut the excess lead. Do this for all of the capacitors.
    • Once the polarity is verified, solder the capacitors in. Once soldered, cut the excess lead. Do this for all of the capacitors.

  19. After verifying there are no cold solder joints, clean the board. This can be cleaned with 91%+ Isopropyl or Denatured alcohol.
    • After verifying there are no cold solder joints, clean the board. This can be cleaned with 91%+ Isopropyl or Denatured alcohol.

  20. Put the monitor back together and test it by giving it a signal. If your monitor works, an image should be produced.
    • Put the monitor back together and test it by giving it a signal. If your monitor works, an image should be produced.

Conclusão

To reassemble your device, follow these instructions in reverse order.

11 outras pessoas concluíram este guia.

Nick

Member since: 10-11-2009

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38 Guides authored

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I did not replace the large capacitor on the Acer monitor yet. All other caps have been replaced. I may have to replace the FSPO55- ZP102A as it has a hot spot beside it. I don't know if the part number is right? Do know where I can buy it. Tom B

Thomas Brady - Responder

These older CCFL panels usually burn on the PCB by the inverter coil and main transformer (the Delta branded part, in this case). The LED monitors limit the failure points to the transformer.

It sounds like your PCB got burned from the heat by the transformer or the inverter coil. This is very common and the boards are designed to take it. However, if you are concerned you should buy a new power supply board altogether if that makes you more comfortable.

Nick -

In step 12, replacing the capacitors with ones with a different capacitance rating instead of using a capacitor rated for higher voltage makes no sense to me electrically. The capacitance rating is the important part, if you use a capacator rated for say 35 volts when the original is rated for 10 makes no difference whatsoever. the rating just means MAX voltage.

Brennan Gomolka - Responder

Thanks @nick! Just waiting for the parts to come in!

Aiden Baker - Responder

@nick which one is the filter capacitor?

Aiden Baker -

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