Beginner looking for help diagnosing LA k092p motherboard problem

[Laurimar Rocha]

A very old client brought me a recently purchased notebook that suffered a lightning strike and stopped working, as in my region no one does plate repairs, he asked me to help him despite my little experience.

Acer Aspire Vero notebook (n20c5)
motherboard FH5AT LA k092p

The notebook turns on the motherboard LED but does not turn on the fans or even the video or any sign of life beyond that, I tested the power input, the power reaches the battery, I tested some components around the processor, some give 5.7v others give nothing and others are 19v, I haven't found a map of the motherboard that I can understand and read the voltages and draw my conclusions.

I come humbly through this topic to ask you ladies and gentlemen for help =D

[mon2]

The schematic is showing to be available on paid sites but my database does not contain it. Regardless, the designs are similar to others.

1) Review the charger circuits article posted above by piernov. It is a must read.

2) Respectively, review the location of the DCin power connector where the fun starts from the outside power adapter and should be ~19 volts. This 19 volts then travels through 2 * DCin mosfets to power the logic board. Nearby these DCin mosfets will be the charger IC which is often from Texas Instruments / BenchMarq and will be with a BQ topside marking. Locate this black square IC and share a clear picture or at least the top side markings. Also share the DCin mosfets which will be black in color and with 8 pins (4 on each side).

The N-channel mosfets (both) will be enabled by the charger IC using a boosted gate voltage of ~25 volts. Only then will the mosfets enable properly. Often one or both of these mosfets get killed and halt the party.

Being a lightning strike, something more severe may have happened with your friend's unit but give it a review.

PS: How is Brasil? Was there in 2000 and hired a helicopter (tourist pricing?) @ Sugarloaf. Could not believe how many steps there are to reach the top of the stairs. Cable ride was fun but should have AC.