Sony Vaio - No lights, not booting

[bitznpcz]

Just picked up a Sony Vaio VGN-BX195VP laptop that isn't booting.

When the charger was first plugged in, the battery light was flashing indicating a flat battery but I have charged it up overnight and it the light has now gone.

I have tested the AC adapter and it is giving out 19.5v (which is correct) and I have used a meter on the pins where the battery plugs in and get a reading of 3.2v to 3.4v which sounds a bit low but there are 6 pins so it could be charging different cells at this voltage. This indicates that the socket should be OK.

What do you guys normally do or test for in these circumstances? The laptop is quite old so I don't really want to suggest a new DC socket, motherboard, battery etc without knowing which is causing the problem.

The strange thing is when the laptop is on battery or AC I can hear a high pitched noise coming from the device (quite faint - you need to put your ear to it).

Any help or ideas appreciated.

 

[usacvlr]

The high pitched whine is from the dc/dc converter on the board. Bad board.

 

[bitznpcz]

Thanks for that. There is a slight pitch change when the power button is pressed too.

I can't find a replacement board on Ebay at the moment so will return to the customer. Thanks again

 

[Andyuk2007]

Laptops are such a pain to fix

 

[bitznpcz]

agreed Andy. The main problem is trying to get replacement motherboards - would be simpler (and a lot cheaper!) if they used a universal form factor and you could install any board