CF-19 mk8 no lights no power on

Hello! I bought myself cf-19 mk8 0 hours.
Toughbook shut down randomly when in bios. No lights nothing. Tried everything cmos battery out no battery no charger removed everything from machine nothing helps. I have working mk6 with me took front button plate wirh ribbon tested on mk6 and works. With multimeter i got 0V into power button, mk6 i had 3.3V. all fuses on board are okay. Voltage is 16.06 from charger freerun and 15.87 when connected to main board.

Can somebody help me with schematics, guide me somehow how to fix this or where to look please.

 

I don't have any schematics for anything that new.

First thing I would check the the port that the charger plugs into.

 

Maybe somebody can find mk6 schematics. Power reaches most biggest mosfets. I located I/O chip yesterday gonna test that today i think problem is there.

 

I compared biggest stuff with working mk6 unit easy stuff is not problem. Main board electronics is problem. Mk6 seems mostly same inside.

 

Ok Test mk8 with mk6's charged battery and whether mk8's battery is charged. Easy stuff to check before disassembly )

 

Tried this also nothing helped i think some mosfet is dead.

 

Can you just return it to the seller?

 

Nope i bought it this way. Seller sayd they do not attempt any repairs so i bought it like lottery maybe easy stuff helps . It looks cosmetic like brand new outside also inside. If nothing helps to get mobo work ill buy tough used one from ebay and swap mobo.

 

Have you checked the RAM? Maybe swap some sticks?

 

I tried everything it get no lights on everything disconnected only front buttons plate and rear VGA/COM AC vonnected. Installed them to my mk6 and they work. Ill wash mobo with IPA today maybe it helps.

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I found 62386 irl chip thats power controller i think but i shorted VIN 15,8V and LDO5 LDO3 PINS with my probe and now no voltage goes trough CHIP. Now its kaput i think.

Datasheet pdf
https://www.google.com/url?sa=t&sou...FjAAegQIAxAC&usg=AOvVaw0J_VvWD4tMfW8MbgBurDPm

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You have to make sure it's dead. Burn and drown.

 

Are you going to replace that chip?

 

Gonna think about that chip. Risky business it is anyone got mobo 4 sale ?

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