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Broken and missing Cap on GTX 590

cralx2k

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I'm trying to fix this GTX590. I have all voltages except the one showing in the pictures 0v. Also, I found some broken and missing capacitors. Do you know de capacitors values? Another thing, how do I know what bios 1 or 2 in case I need to reflash the bios? the chip is 25L10005 for both?

Thanks
cralx2k


3.jpg
 

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NGOHQ.COM
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Yes, two 25L10005 chips for dual GPUs, left one is probably the 1st. Don't reflash if you don't really have to.

Look for text or some writing on the capacitor. Hard to tell what is what.

Measure it by exact size and take a multimeter reading from the one next to it.
 
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cralx2k

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Yes, two 25L10005 chips for dual GPUs, left one is probably the 1st. Don't reflash if you don't really have to.

Look for text or some writing on the capacitor. Hard to tell what is what. Measure it by exact size, or take a reading from the one next to it.
Thanks for you respond. These 2 caps are 0402 there is not text or any reference in the board.
 

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I'm no expert but its most likely 10nF 25v or 50v. Measure the one next to it.
 
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It sits on the compensation pin according to the datasheet. It needs to be calculated. It ranges from 10pF to 100pF if you look at examples. Put the real values in the formula given in the Richtek datasheet.
 
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I would worry if the two soldering pads they are both still intact = there is continuity with the rest PCB.
With out high quality fine-tip soldering iron, the repair will fail.
 

cralx2k

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I would worry if the two soldering pads they are both still intact = there is continuity with the rest PCB.
With out high quality fine-tip soldering iron, the repair will fail.
They are OK. I have all the necessary equipment ...
Thanks

I replaced all the capacitores and now I have the 1.2V. I have all voltages in the graphic card but still doesn't show video. For the next step, should I have to reflash the bios and reballing the GPU and SLI chips? Thanks
 

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Are 100% sure that this card accepts power due old style of 6Pin Plus2 ?
You better test with another power supply with dedicated 8Pin PCI-E plugs.
 
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