Lenovo R60 power problem

[JosipMiller]

Hello,

Following problem occurs when trying to power up R60:

Two days ago (and before) it was working perfectly both with and without battery. SUddenly, it won't power up with battery at all and with battery pulled out it powers up for cca. two seconds and turns off. After that it wont turn on at all, but when I pull out power chord and put it back after, say a minute, it could be powerd for two seconds as before. When battery is inserted again, it is completely dead again.

I checked power supply, gives proper 20 Volts.

Could it be motherboard problem ? BTW, I removed CMOS battery for cca 2 minutes. I hope that is enough.

Thank you,

Josip