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Budget 15" laptop series released by HP.

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Tension is OK but PC doesn't turn on

Hello all,

I’ve an HP laptop, model 15s-fq1024nl that doesn’t turn on.

Actually I’ve checked these things:
- plugged in charge and power led of charghing connector (of pc) turn on and make the classic orange light;
- checked the tension at the battery poles and it is “alive” returning a 12.7V;
- successfully checked the tension that arrive to motherboard battery connector;
- when I click on power on button, the lateral white led turn on for a second and then turn off;
- screen remain black and doesn’t shown anything, thefan is stopped and doesn’t start.

The PC is equipped with Intel core i3 10th generation, ssd 256gb and 8gb ram

Have you some ideas or some advice on how to proceed?

Thanks everyone in advance

EDIT: already tried a power refresh, motherboard model 05PD DA0P5DMB8C0 REV:C

Update (02/12/2022)

Tank you all for your support.

I’ve found now some link corrupted on motherboard and after fix it, pc works good

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Hi @jappo ,

Try a power refresh in case it is a corrupted BIOS that is preventing a normal start.

i). Disconnect the charger if connected.

ii). Disconnect the battery from the motherboard.

Here’s the maintenance and service guide for the laptop, taken from this webpage. Go to p.30 to view the necessary pre-requiste steps and then the procedure to remove the battery.

iii). Press and hold the laptop’s Power On button for a full 30 seconds and then release it.

Doing this will dissipate any residual charge in the motherboard and restore the BIOS to its factory default settings. If you had changed any user defined settings in BIOS to suit your particular operating requirements you will have to change them back again after doing this.

iv). Reconnect the battery to the motherboard.

v). Re-assemble the laptop, reconnect the charger and try turning it on.

If still no good, what is the motherboard’s board number, as printed on the motherboard?

I looked online and I think that it might be a a Quanta 0P2/0P2A DA00P2MB6D0 Rev:D motherboard. If this is correct, here’s a link to the schematics which may help. If it is not the correct one then search online using the board number only, to hopefully find the correct one.

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Hi @jayeff,

Thank you for your reply.

I haven't wrote it but I've already did a power refresh.

Now I've searched the schematics of my motherboard but I haven't found, the correct motherboard is model 05PD DA0P5DMB8C0 REV:C

por

@jappo

I can't find one either.

The laptop being only released in 2020 means that most probably there won't be one available for a while.

por

@jappo @jayeff you are both right. Quanta OP5 schematics and/or boardview are not yet available anywhere.

por

@jayeff Unless there's settings a user needs to keep, I disconnect both the primary and CMOS batteries. Sometimes removing one doesn't help, or the issue remains.

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@nick @jayeff Thank you both for your help, I think that I’ll wait and continuously search for a schematics to solve it.

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What often works on HP for me is you want to disconnect both the primary battery (and CMOS battery if possible). With HP, removing the CMOS battery while keeping the primary battery does inadvertently preserve the CMOS RAM on some, so both should be disconnected. Here is the service manual.

Once you disconnect/remove both, hold the power button for 30 seconds. However, you DO NOT reconnect the battery right away; the trick is you want to power the notebook on since that will clear the CMOS RAM, and it will reload the default values. It often starts up after that. It can remain installed; just leave the connector on top, and do not reinstall the bottom cover until it is reset. Wait until it says the CMOS settings were lost, even if it takes 15-20 seconds — this is sometimes normal. That said, you mainly see the startup delay on SureStart (commercial) notebooks as it reloads the full backup BIOS, not just the default settings. However, it can also occur on any of the consumer HP laptops with even basic BIOS protection from the past ~5 years or so. This is by design. Once finished, you want to see this screen (840 G5, in this case):

Block Image

Once it’s starting, you want to shut the notebook down and then reconnect both batteries — it’ll default again, but that’s fine as the settings will save once it’s back together.

Once you do that, it usually resolves the issue. If it doesn’t, it’s either the power button or motherboard.

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The battery sitting at 12.7V and still showing a orange light might indicate there are some problems.

Assume it’s a 3 cell battery, the empty voltage is 3.7 * 3 = 11.1V and full voltage is 4.2V * 3 = 12.6V.

If 4 cell the empty voltage is 3.7 * 4 = 14.8 and the full voltage is 4.2 * 4 = 16.8V. The voltage of battery should be listed on the pack.

The system may refuse to start if battery is below 0%.

Alternatively, press and HOLD the power button as it powers on and off (for at least 10 seconds), see what happens. I recall a “bad” BIOS for a certain laptop that doesn’t power on correctly if the power button is released too soon.

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