Re: Need help to repair a RX580 Sapphire Pulse



Hi fab13,

Thanks again for your help ! The resistance seemed a bit burnt on the side but nothing bad (no strong decoloration or no deformation here). ... That's why I did not decide to change it at first, but I guess I was wrong...

Since the value of this resistance is very low, maybe any damage (even the smallest) can change it... I don't know, my knowledge here is very poor......

Re: Need help to repair a RX580 Sapphire Pulse

Hi fab13,

I finally found out what was wrong in the card. I'm joining two schematics extracts you gave me (the MSI one).
The pin 5 of the U2 chip was at 0V. As I previously said, I though (wrongly) that the responsible of this was the U2 itself. After remove it, the pin 5 was still directly to the ground when I powered up the card (short notice : as Erminba said, don't do this it could fry memory controller). So I bought another APW8722A, put it in place and I tested the other components from the +VDDCI_VCC line....

Re: Need help to repair a RX580 Sapphire Pulse



Hi there,

Thanks for your message. Well, I'd like to tell you what measuring points I need but I don't
Simply because I don't what to do with these measures
That's why I asked some guidance here. But I appreciate your help
For your missing part, here is a picture of the zone (sorry the picture was taken with my phone)

Just fyi, the U300 is a GS7103 and the Q210's name is : S1A. After searching it, I found the ref in a russian forum (I can send you the link if...

Re: Need help to repair a RX580 Sapphire Pulse

Hi there,

Thanks very much for the schematics. I already have them all and the MSIs are the best lead here. Nevertheless, it seems that sapphire adds some voltage regulation circuit that MSI has not...

As you said my problem is more complex without these diagrams... The strangest thing here (and you pointed it with the 5V) is that the 12V PEX doesn't seem to be impacted by the short...

I'll try to look further into the MSI schematics... Thank you again !

Hi everyone,

I've got a rx580 Sapphire Pulse stopped working while I was playing a game.
Since then, when I turn on my computer, the fans are spinning but the card is not recognized (no display neither). The GPU core is heating when turned on. I'm a noob in electronic and I followed some youtube stuff but no luck for now.

I wrote down what I found (see the pictures) and I got a strange behavior on the APW8722A, on the top left. The VCC pin (the 5th) has 0V and 0 Ohm when the card is powered up.
According to the APW8722A datasheet, from a second APW8722A...

Re: New Members - please post your introductions here

Hi there,

I'm a 40 years old computer science guy with some micro skills in electronics. I'm trying to repair a rx580 sapphire for 2 months now but it seems that I can't do it alone (as I already said : micro skills XD).
I tried to read and learn a lot of stuff from here but since I have found what's wrong with my card I think the best way is to open a thread