Liquid damage, No short on Motherboard only chimes nothing else
I am into electronics for approximately 4 years and I already repaired a lot of things. A lot of boards of monitors, tvs and even laptops. So my cousin contacted me, after he spilled cola onto his macbook.
He tried to dry it. Now the macbook tries to startup. A chime sound is played, but nothing happens afterwards. No image on the screen. I controlled if the backlight is not working, but there is no image whatsoever. I tried to plug it onto my monitor. No image also. No backlight of the keyboard. Capslock light not working also. So the laptop is dead.
I opened up the board and inspected it with my multimeter. I found no shorts on the board. Trackpad is also clear and no shorts.
I connected it to the power and tried to measure some Voltages.
There a 3 Coils and I measured everyone of them.
I have a 5V on one Coil. (LC320)
12V on another coil. But only in the small bootup sequence with the chime. (L5230)
But the last one has no voltages at all. (LP800)
The part numbers with (XXX) I have from the BoardView I found on the internet. I can upload the bord schematic too if needed.
So I don't know whats wrong. Unfortunately I can't find any similar problems on other threads. Any ideas?
Thanks in advance
Bu iyi bir soru mu?