I have a toshiba u400 that turns on for 1 sec and immediately off . When you connect the power adapter, battery seem to charge (charge light is on) . I took apart everything and found that if I remove the processor laptop power stays on . Tried different processor , problem the same . It doesn't have any nec/tokin caps on cpu socket . Any ideas ?
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Re: toshiba u400
check cpu vcore power area... -
Re: toshiba u400
Found 2 shorted capacitors . Removed both but when tested out of board seemed ok .Comment
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Re: toshiba u400
Have you got the schematic for this Toshiba?
If you have an external power supply, (regulated and short-circuit capable) you can inject a low voltage to the positive connection of capacitors, (negative to ground) and see if there is something that gets hot. (another cap.)
The voltage should be as low as possible, and increment in small-steps, if required.
Good luck.Comment
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Re: toshiba u400
What kind of power supply can be used for this and exactly how low should the voltage be?Comment
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