Sony Vaio MBX 165

[Tea_4_2]

Hi I have two Mobo Sony Vaio MBX-165 Rev 1.0 and a Rev 1.1 both with the same problem they aparently boot but the LCD stays black as a coal mine tried a external monitor with no success, had the GPU reball also with no success the symptoms the behavior before and after reball are the same, can anyone please help me on this?

Thanks and my best regards for you all

Tea_4_2 from Portugal

[lefos]

Re: Sony Vaio MBX 165

Hello,

In order for the external monitor the nvidia's drivers must be loaded so the laptop has to boot fully into the operating system. Have you tried with a different panel? I've had issues on the backilght a lot of times on these models.

[alihomee]

Re: Sony Vaio MBX 165

if u did not connect the lcd cable it should goes to vga.try with new gpu

[Tea_4_2]

Re: Sony Vaio MBX 165

The lcd and inverter are ok. tried with another board wich is ok and they both work.

alihomee you mean to disconect the lcd cable and connect an external one ?
Thanks

[dj_ricoh]

Re: Sony Vaio MBX 165

those sony are super sensitive.
i cook a board like that and it work.maybe maybe but beware how to , cuz the last one i did a coil fell down and it`s not easy to find it.

look for cold solder. cpu socket broken? press it when you power it up.
use a power supply when you press the MOBO cuz if something its wrong with the CPu socket or chipset the PSU will display a another value on Amps .

[lefos]

Re: Sony Vaio MBX 165

Have you tried with a new gpu chipset?
G86-750-A2s sometimes need to be replaced.

[Tea_4_2]

Re: Sony Vaio MBX 165

I did try to cook the mobos but with no success so i subcontract someone to reball them cause i dont have a reballing station but they came exactly with the same symptoms, i.e., they aparently boot ok HDD spins and seems to work DVD drive also, if i take the RAM out it doesn't boot but screen is blank. They used the same GPU so i don't know if the problem is with the GPU i've already cooked other similar mobo redesigned the cooling system with better copper dissipators instead of those rubber like pads and they are working fine. but this two i've now don't.