[SOLVED]Toshiba L850 PLR/CSF

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MDY

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Somebody replaced the screen with main battery.
Without RTC battery, board power cycling each 1seg. CPU core present at 1V.
PCH or KBC suspect?
 

MDY

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I replaced KBC. Now it power up and got video but only works without RTC battery. If I put rtc battery doesnot power.
I have another L850 and already tried another power button and cable and I checked 3V goes to 0 when power button is pressed.

Any idea why it doesnot power with power button?
 

MDY

New member
it is PLF/CSF schematic but there is no schematic for this board.
I can shutdown this board from power button. I just cannot power the board.
I replaced KBC again and all the same.

Could be PCH problem?
 

MDY

New member
You are the Master, yes. Pretty easy to find LID in this board. It connec to pin 75 and it was on 0.6V. I force it to 3.3V but all the same. Then I found out that KBC 775 I put is version P and original one is version L. Then I replaced KBC again and now it works and I have 3.3V in pin 75 - LID
I also compared all 128 pins between both KBC and there were 7 different. Now it works. Thanks Duke
 
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