Dear Sir,

My home got 2 PC...
recently, both PC can't work just a few days different.

1st one: When power ON it start to boot up as normal. On the half way it suddenly stopped everything.
press power again, it start again and stop suddenly. Sometime, it stop immediately after beep sound. 
sometime it stopped when windows is about to load. sometime it stop while POST and RAM checking....

2nd one: Totally nothing come out. No beep, no monitor signal.
Before pressing button, when power up, its power and HDD light on. Optical drive light on. CPU fan is turning... hear a little sound from HDD. Thats all. Nothing happened after that. both HDD and Power light is still on.
When press power button for a few sec. Both light goes off. but Ethernet card and MTB light is still on.

I tried swap CPU and RAM between two PC. Same thing.
I tried reset CMOS .. No different.
IT seems that CPU and RAM has no problem.
But both motherboard can be spoiled???
Is there any other possibilities.

Can advise anything???

Thank you

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