EEVblog Electronics Community Forum

Electronics => Repair => Topic started by: OverclockVintage on June 08, 2021, 07:41:56 am

Title: Shorted Grapghics card (Geforce GTS 450)
Post by: OverclockVintage on June 08, 2021, 07:41:56 am
Hi i have this Geforce GTS 450(mine) with short circuit that i removed the electrolytic capacitors and the phase bobins to help me realize the source of the problem, but a whole lot of stuff is shorted to ground. Then i am posting this picture to help explain about the short circuit. Thanks in advance.
Obs: Don't bother the bios chip, i replaced the original one, if this is not compatible i will have it to replace it again, and i also added two smd resitors close to the bios chip, it is ugly but it is well conected.
[attachimg=1]
Title: Re: Shorted Grapghics card (Geforce GTS 450)
Post by: OverclockVintage on June 08, 2021, 07:43:40 am
Back of it.[attachimg=1]
Title: Re: Shorted Grapghics card (Geforce GTS 450)
Post by: Alex_Baker on June 08, 2021, 08:11:58 pm
If all of that is shorted to ground I would take a guess and say that the GPU die itself is very very dead...  :'(
Title: Re: Shorted Grapghics card (Geforce GTS 450)
Post by: OverclockVintage on June 09, 2021, 05:01:17 am
Hi, i wondered about that,well i guess, the only option would be trying to get another chip and replace that one. It is hard to find one though. Thanks for helping  :-+ .
Title: Re: Shorted Grapghics card (Geforce GTS 450)
Post by: OverclockVintage on June 09, 2021, 01:04:51 pm
I i've just removed the GPU chip, does anybody knows where i can buy a replacement one?
Title: Re: Shorted Grapghics card (Geforce GTS 450)
Post by: ambrosia heart on June 10, 2021, 05:02:04 am
Go to Taobao or Aliexpress  :popcorn:
At taobao search for GF106-250-KA-A1  :popcorn:
and also search for 液体松香，锡球，钢网。 :popcorn:

search GTX450 chip for more details. :-+

Search you tube BGA reballing.
Title: Re: Shorted Grapghics card (Geforce GTS 450)
Post by: OverclockVintage on June 10, 2021, 08:59:27 pm
Thank you so much ambrosia heart, im gonna try those.  ;D :-+
Title: Re: Shorted Grapghics card (Geforce GTS 450)
Post by: Dubbie on June 11, 2021, 12:16:03 am
I'm sure you have a good reason, but I am wondering why you are bothering to fix this very obsolete card?
Title: Re: Shorted Grapghics card (Geforce GTS 450)
Post by: Alex_Baker on June 11, 2021, 02:41:51 pm
Excuse my ignorence, but are the GPUs that you can find on taobao priced at 70 YEN! which converts to only about 70 cents USD? how is that possible.
Title: Re: Shorted Grapghics card (Geforce GTS 450)
Post by: OverclockVintage on June 11, 2021, 04:25:50 pm
I think you have to pay attention to the price in HKD, one US dollar is around 7,8 Hong Kong dollars, so those gpu chips are around 10 US dollars or more.
Title: Re: Shorted Grapghics card (Geforce GTS 450)
Post by: Alex_Baker on June 12, 2021, 06:51:59 pm
I see, I didn't see that number. I have never bought anything from a site like taobao...
Title: Re: Shorted Grapghics card (Geforce GTS 450)
Post by: OverclockVintage on September 07, 2021, 04:08:45 am
Hi people, i've already replaced the gpu chip, now i still have a problem with the bios chip that i need to replace. So my doubt is, the original bios chip was a 25Q20BSIG, can i replace it with a 25Q32BSIG? Because the 25Q20BSIG i cannot find in my country. Thanks.
Title: Re: Shorted Grapghics card (Geforce GTS 450)
Post by: aqibi2000 on September 09, 2021, 11:20:16 pm
Short to ground, how many ohms 7? 😂
Title: Re: Shorted Grapghics card (Geforce GTS 450)
Post by: OverclockVintage on September 24, 2021, 12:15:46 am
Sorry for tanking so long to answer, well i've already replaced the chip, so it is not shorted anymore.