Re: ASUS X555LD Not charging battery after coffee spill



I know this is very old but I haven't forgotten about it. I just checked the DC-in MOSFETs and the first one is indeed shorted - there's a connection btw Drain and Source when OFF. No issues with the second one. I'm assuming the first one went bust by design to prevent further damage to other components. I don't have the tools to replace the part myself so I'm looking for places that can do it. I plan on using this laptop as a home server for Plex so hopefully after this I can finally declutter my main laptop...

Re: ASUS X555LD Not charging battery after coffee spill



I agree w you and the datasheet states the same. However, as far as I understand, ACDRV is used to power the system from AC rather than battery and that's working fine; the laptop runs when the adapter is plugged in but the battery does not get charged. The laptop runs on battery too if there's charge in the battery, but since there isn't any, the system turns off as soon as I remove the adapter. If my understanding is wrong, please correct me

Thank you for your reply and help; I appreciate i...

Re: ASUS X555LD Not charging battery after coffee spill


What is the right way of cleaning it? I don't remember exactly what I did (this was back in february) but I used a q-tip with water (?) or isopropyl alcohol on it to wipe the area where the coffee residue was in....

Re: ASUS X555LD Not charging battery after coffee spill



Hello, thank you for your help. I have a few follow up questions:

1. Which part is the RTC battery?
2. How do I check if the DC-in MOSFETs are shorted?
3. The resistance btw ACN & ACP is very low; my DMM reads 0.3 and [URL="https://www.badcaps.net/forum/attachment.php?attachmentid=211038&d=1587446134"]this schematic[/URL] shows that the resistor has a value of 10m. The voltages at these two pins are equal at 18.34V
4. The voltage at pins SRN & SRP is...

Re: ASUS X555LD Not charging battery after coffee spill


Hello,

Thanks for your help. I checked the voltages on those pins:

ACDET - 2.6
ACOK - 2.99
ACDRV - 19.02

Looking at the pins descriptions in the datasheet, these values seem correct....

Re: ASUS X555LD Not charging battery after coffee spill

Hello,
Thank you for your reply. The laptop did run from battery after replacing it but only because the new battery had some charge already. The laptop ran on battery until it was discharged so afterwards I had to keep it connected to AC to have it running. This confirms that it's just the charging chip that is at fault.

I also found more schematics of the laptop (see first attachment)

I found the charging chip in the boardview and it's PU8800 - CHARGE MANAGE IC HPA02196RGRR.
...

[B][SIZE="3"]Issue[/SIZE][/B]

- Long time ago, I spilled coffee on my laptop
- The laptop shut down right away and I made the mistake of turning it back on right away
- Laptop runs fine when adapter is plugged in
- Battery does not get charged

[B][SIZE="3"]What I've Tried[/SIZE][/B]

- Replaced battery with new one
- Measured adapter voltage; there's 19V coming in
- Measured voltage at DC jack — 19V present
- Measured the voltage at the battery connector; here are the values:
...

Re: New Members - please post your introductions here

Hello, ECE student here trying to apply his newfound knowledge to practical issues. Found some great resources in this forum and looking forward to learning more.