Compatible motherboard for laptop

February 15, 2020 at 08:46:45
Specs: Win 7 ultimate, Intel t7250 / 2gb ddr2
Hello everyone!
I have an old sony vaio vgn-fz31m laptop with gpu 8400 problem. So i decided to change the motgerboard in order to make it work. The problem is: they're not that easy to find! But the one i found, I'm not sure would it be compatible with the rest of my hardware. This is the board i found:

Board model: MBX-165 MS90 REV:1.2 MAIN BOARD
Chipset: INTEL 960 SLA5T
South Bridge: NH82801HBM SLA5Q
Socket: mPGA478MN

My laptop specs:
T7250 cpu
2gb ddr2 ram
Nvidia 8400

So my question is: would it work if i put this board instead of mine?


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#1
February 15, 2020 at 11:57:39
Sony acknowledged the defective 8400 graphics in the VGN-FZ31M & had been repairing them free of charge, but that was a long time ago. The GPU needs to be "re-flowed". If you haven't ripped the laptop apart yet & if it's still bootable, fire it up, wrap it up in a towel or blanket (don't close the lid) & let it run a video intensive program for at least an hour so that the GPU gets really hot. The excess heat might be enough to re-flow the solder.

EDIT: From what I could find, the original mainboard is Sony P/N A1512276A.
https://i.ebayimg.com/images/g/2awA...

message edited by riider


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#2
February 15, 2020 at 13:58:05
" The excess heat might be enough to re-flow the solder."

If the temperature of the GPU gets that hot, then almost certainly some other damage would occur. Leaded solder reflows at 183°C (361°F). It likely is lead-free solder, which is even a higher temperature, 217°C (423°F). If any reflow is to be done, it needs to be removed from the unit.

"Channeling the spirit of jboy..."


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#3
February 15, 2020 at 16:15:38
Thank you both, but i think it's easier for me to change the motherboard, which i can do for 20 euro. But i really need the info if this one is going to be compatible with the rest of my hardware. And yes, the one that i can buy looks exactly as the one Riider linked picture of.

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Related Solutions

#4
February 15, 2020 at 18:20:08
I mentioned the towel/blanket trick because I've done it successfully before.

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#5
February 16, 2020 at 11:27:57
Makgora

The problem with replacing the board is that you have no assurance the replacement won't have the same issue. Probably better to repair it.


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#6
February 16, 2020 at 12:25:52
Thank you for trying to help, but i really just need the answer to my question, since I'm doing it 100% for fun. Also, I do have assurance that motherboard works correctly. I just need help with compatibility issue that i have.

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#7
February 16, 2020 at 21:56:19
If buying from a reseller, they should be able to verify compatibility. As far as working goes, your present graphics worked until it didn't. Sounds like a defect in the board. If it was never fixed it may be vulnerable to failure.

I had a similar issue with an Epson print head. Lots of parts were available and advertised as working. Mine was also working but not very well. I elected to buy a refurbished print head instead.


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#8
February 17, 2020 at 01:38:06
I thought the next step after wrapping a towel or blanket around it would be to hit it with a hammer--covering it would keep broken parts from flying everywhere.

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