Hello guys!

Ive got lying around here a coworker's laptop (Acer Aspire 6930 ZK2) wich suffered a small spill on its left side (vga/usb/rj45/ dc sockets) and of course its entirely dead now , not a single led when plugged in.



With the schematic above and hoping to find something obvious , ive started working from the dc connector (PJ1 on page 32) onward but being quite green reading schematics im not sure what to check after making sure the fuse and the initial caps and coils are ok , wich other critical voltage should i be looking for besides de 19 DC from the charger? any hotspots that i should check first?

Thanks in advance for your time
Aiki

Check the 3/5V SYS Power - IC 6237 first. And signals on X`TALs.

Hello MSF113 , sorry for my late response , I was getting hold of a microscope to post a picture

I did check the ISL6237 (PU5 on schematic) if im understanding correctly , this IC delivers 5VDC (OUT1 Pin10) and 3VDC (OUT2 Pin30) to the entire system , is this what some people refer as the power supplies?! Ive read elsewhere about servicing them as part of a regular troubleshooting.

Results of my test were all negative tough, zero volts on either OUT pins and all other pins for that matter , tracing back from the IC i tried to locate the 15V_ALWP (Always present??) signal on PR79 but that was also zero.Being a noob on the subject i wasnt sure about testing live or just plugged so i did both , just the charger and both charger and turning on the board , nothing.

Seems like the problem is before this stage , I have no clue what you mean about signals on X`TALs .

You can see a pic of the area of the board with the IC and the Resistors where the 15V should be present , unless im reading this wrong , also a clip of the schematic for the same spot , as I side note , is there a more suited type of test leads for this kind of ICs? the regulars from my fluke seem huge! :)

Thanks!
Aiki

And what is going on at pin #6? There must be 19volts.

No dice! testing at PC47 at first I tought it was zero , adjusting for scale im measuring 2.2 mV.

I dont know maybe im doing something fundamentally wrong , im using metal parts on the same board as ground , testing at joining components rather than directly on the pins of the IC , but nothing , nada.

Lol please ignore the comment above , I did measure 19 VDC at PC41 wich is linked to Pin6 of the IC (VIN).

Edit:Im adding another pic of the area , plus a zoom of what seems to be a lost pin on the isl and a missing cap?? , testing the pin 6 directly is either impossible with my leads or its just zero.

Sorry for all the attachments , but im a basic guy , need my visual aids!