Question Video card EVGA GT 640 the component marked is exactly SOT-363 ?

Mar 12, 2023
17
1
15
Hello. All good with you ? Thanks for reading my topic.
I have novice eletronic knowledge.
I have an damaged video card model EVGA GT 640.
That video card was analyzed only one component is damaged. Not damages in vcore area.
That component is melted being hard to identify. Have 6 pins ( 3 in each side ).
In image in last line the component is between red lines.

That component is the SOT-363 , SOT-363-3 or SOT-363-6 ? both are similar ?
I see another detail about SOT being polarity ... that SOT is NPN , N-channel or P-channel ?
SOT-363 , SOT-363-3 or SOT-363-6 are only NPN ?

Thanks for reading.
Have an nice week.

https://eletronicabr.com/uploads/monthly_2023_03/4.jpg.20cb0822a2bf5e526249a706aa479c8a.jpg
 

DSzymborski

Titan
Moderator
Do you have a soldering station and significant experience using it?

If not, this is a job for a knowledgeable friend or simply buying a new one; used GT 640s go for about $25, so between shipping and the part, you won't save much money tinkering with the GPU yourself. GT 740s go for about the same price and are slightly "better."
 

Ralston18

Titan
Moderator
This:

"That video card was analyzed only one component is damaged. Not damages in vcore area. "

How was the video card analyzed?

What is the video card doing, or not doing, when in use?

What other troubleshooting, if any, was done?

Unfortunately many such things are not meant to be repaired and even if repairable you will need the repair schematics and the replacement the part(s). Manufacturers do not release such information.

Plus there may be other damage that is not visible.

Do you have the necessary soldering skills?

Overall, a repair may cost more than just purchasing a new GPU. How much are you willing to spend in time, effort, and costs?

All for DIY fixes and repairs.

Sadly that is becoming less and less a viable option.

Just my thoughts on the matter.
 
Mar 12, 2023
17
1
15
@DSzymborski

Thanks for your reply.

"Do you have a soldering station and significant experience using it?"
I have an friend will to do that job.

I am from Brazil ... video cards are high price and also the repair will be simple.
Today the correct video card to buy is minimal RTX 2000 series. If not is possible is better wait another moment.

@Ralston18
"That video card was analyzed only one component is damaged. Not damages in vcore area."
My friend is eletronic professional. Thus the video card was analyzed and not any damages in vcore area.
I only need change the damaged component.

I need figure what component is exactly .. SOT-363 , SOT-363-3 or SOT-363-6 ...
 
Mar 12, 2023
17
1
15
Really the component is the MMDT3904.
Removed the damaged component and replaced with MMDT3904.
Now Video card power on.
Need tests power on for long time and 100 % for confirm if is having correct voltage and amperage in vcore.

Thanks very much for all users replying in my topic.
Have an nice week.
 
  • Like
Reactions: Tac 25