Having problems with your Sony VAIO VGC-RB42G PC Desktop ?

Sony VAIO VGC-RB42G - No Power; Blinking green light on power

\015 The PC won't power up but the green light on the back of the power supply module blinks continuously. The same with a light diode on the motherboard. I unplugged the unit for close to an hour, replaced the lithium battery on motherboard but still, unit won't start-up. Please help solve\015

Answers :

Try a different known working power supply on that computer, the green light on the power supply should be constant and not blinking. The green light on the motherboard shouldn't be blinking either but if its not getting the right voltage from the motherboard then it will blink as well.

Get a different power supply and see what happens. At that point the power supply green light should be constant, if its not then your motherboard is faulty at that point, if yout the green light is blinking on your motherboard, if both are constant then reseat the memory and CPU and only have the power supply hooked up to the motherboard and not to anything else.

If you still can't get video then at that point you know the motherboard is definitely bad.

Your ram may be faulty.
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