XFX RX 5700XT No Display

[Goblin999]

Re: XFX RX 5700XT No Display

I also got an RX5700 XFX DD that has the same issue as yours . The GPU gets warm-to hot when powered up . I first measured for shorts on 12v and 3,3v rails and seems good . Card does not get seen at all in HIVEOS . I measured some resistance on various parts and they all have some ohms but I don`t know which is good or bad becauseI just started to repair GPU , inspired by @dicky96 . I did not test voltages because I stop the card as the GPU chip is getting warm and I didn`t want to brake it . The thing is some guy who sold me the card told me that he went to a repair shop and they said the GPU core is bad . Could that be possible and the GPU still get warm to hot when powered up ? Can anyone help me into pointing where to look ? Thanks a lot guys

[frazerxavier]

Re: XFX RX 5700XT No Display

i Also feel the 1.8 ohms on the PEX Inductor is a bit too low even though i get 0.905V on it. Does any of you feel the same or am i am looking in the wrong direction.

[frazerxavier]

Re: XFX RX 5700XT No Display

Have you checked if the card will give a picture if used as a secondary GPU?

No Richard, i have not tested that. but i will surely try that when i get the card back.

[dicky96]

Re: XFX RX 5700XT No Display

Have you checked if the card will give a picture if used as a secondary GPU?

[frazerxavier]

Re: XFX RX 5700XT No Display

Dont reflow the Chip unless you can tell for sure that something is Abnormal ! Get an oscilloscope and check CS (Chip Select Pin 5) of the Bios Chip you should see 3,3V getting pulled down when the Chip is reading bios. Could be the litte 22mHz Quartz oscillatior. And check your PEX_Wake, PEX_Reset, SMCLK,SMDAT. You can find the pinout of the outputside PEX connector on Wiki.

Also have you tried using your iGPU to see if the GPU just has no Picture but is detected?

Thank you sippey for your reply. I don't have an Oscilloscope but i have ordered one. It should be here in a week or 2. Mean while i have handed the card back to my friend. will wait for my Oscilloscope to turn up at my door. Once i have all the tools will test the IGPU as well to check if it detects.

[SippeY]

Re: XFX RX 5700XT No Display

Dont reflow the Chip unless you can tell for sure that something is Abnormal ! Get an oscilloscope and check CS (Chip Select Pin 5) of the Bios Chip you should see 3,3V getting pulled down when the Chip is reading bios. Could be the litte 22mHz Quartz oscillatior. And check your PEX_Wake, PEX_Reset, SMCLK,SMDAT. You can find the pinout of the outputside PEX connector on Wiki.

Also have you tried using your iGPU to see if the GPU just has no Picture but is detected?

[frazerxavier]

Re: XFX RX 5700XT No Display

Can anyone suggest. Should i consider reflowing or reballing the BGA chip? Its just that i want to make sure that i am exhausting all options before i get to the BGA chip.

[frazerxavier]

My friend handed over a xfx 5700xt with no display. When is first inspected the card is saw that the caps at the back of the card on the PCIE were knocked off with pads missing.
I have fixed the pads back and replaced the missing caps with 220nf caps. I have tested that the pads are connected well and are making contact. i did check that there are no shorts on the 12v PCIE, 3.3V PCIE and the 12V coming from the power supply connectors. When i power the card ON i have all voltages but no display. I did a resistance check and i have marked my findings in the pics i have attached. I have never worked on a RX 5700XT before and i do not have any schematics for this board. I have tried switching the BIOS switch to the second position and its still the same. i have rewritten the BIOS with chip with the relevant one from Techpowerup and still no display. The GPU chip is getting warm. Upon doing a diode test in the PCIE lanes connecting to the BIOS chip i get 0.898V on all 16 lines in the front. The memory modules are of Samsung.
Can anyone assist where i might be missing out on or may have gone wrong to analyze. I am not an expert and i consider myself as a learner. I have attached the pics of the card for reference.