Sony Vaio PCG-7y1m laptop wont boot

Hi all, new to this forum but it looks like there are some very knowledgeable people on here that can help me. The laptop powers up but I get 3 constant green lights no beeping, fans power up nothing on screen. I suspect hard drive but before I swap it out any other ideas?

cheers

 

Just a quick update, the 3 green leds for capslock number lock and scroll lock all light up, the power led is on green, battery is amber and the hd light lights amber briefly and seems to be reading the disk, fans come on, cd drive spins up and lights up when i put a os disk in, then nothing no bios post or anything. Anyone know the procedure for flashing the bios on this machine?

MODEL is VGN-N38E

 

Anything at all ?

 

Try static discharge (SD)
- remove battery and PSU, press power button approx 15 sec.
after try start.

if not help remove one of memory and retry again SD

VGN-N series has problem with memory parity issue, if you not been success please contact me [email protected]

 

Tried removing battery and holding power button already. I've just tried removing each 512mb ram module in turn and doing above reset, still same. Also tried reseating the keyboard ribbon cable and checking hard drive is seated ok.

Any other ideas?

Cheers for help so far.

 

I have tested the hard drive and ram modules in a working laptop and both are fine. I've tried another hard drive and ram module in the sony and its still not booting. The battery is fine and charging as it should, mainboard looks ok, no signs of heat damage, checked all connections. Just got to check the cpu is seated properly and check the heatsink is making good contact. Also need to test the mainboard battery is good.

I did notice a couple of things on the mainboard, an empty socket near the bottom left next to the hard drive, not sure what this is for or if anything is missing? Also 4 tiny dip switches, I assume these are to alter the FSB etc for different models, does anyone know the default positions? Or maybe a mother board manual, its an MBX-160.

Any ideas?

 

Any ideas at all?

 

HELP!

 

MBX died - is already in silicon heaven -sorry

and DIP have here 1,2,3,4 off on on off Is due to different of LCDs

 

Not quite ready to make the funeral arrangements just yet
It is supposed to be a quality product after all
Oh and my dip switches are not set as above
Motherboard battery tests good, keyboard swapped out for a good one and screen checks out ok.

 

My motherboard dip switches are :-
1 OFF
2 OFF
3 ON
4 OFF

SO ARE THEY SET WRONG?

Thanks for helping.

 

yes is wrong N38E has to be off on on off
did change anything when set as be?
have you display working?

 

I have set dip switches to OFF ON ON OFF, still no change. What difference should this make?

 

is due to type of LCD

WXGA (CPT) off on on of
WXGA (QDI) on off on off

for VGN-N3x series are only this 2 setting