XFX RX 5700XT No Display

[Goblin999]

Re: XFX RX 5700XT No Display

That resistance looks bit too high. might have to trace using a schematics for a 5700xt.

Sadly there is no schematics for this card as I was searching the interenet . Some specialist here on forum sent me a private message on what to test , but I cannot understand quite well . Maybe you can help me out on this :

(Try it with a mining adapter in single PCIe lane mode

Have a look at the resistance to ground (use doide mode) on all the PCIe lanes - both the side which has a direct connection and the side which has the little capacitors on each pair of tracks. On this check from the capacitor to ground, not ht ePCIe finger to ground. They should all read the same - any reading different suggests bad GPU

Have a look at the reset signal coming from the PCIe (SMRST) it is usually ANDed with the Power Good coming from the last vrm to power up - check as best you can this is getting to the GPU) .

I will attach a photo with what I think I should measure in diode mode . Is this pcie lanes (with green circle around them) ?

[frazerxavier]

Re: XFX RX 5700XT No Display

Yes , it has resistance and quite big (6,12 mohms)

That resistance looks bit too high. might have to trace using a schematics for a 5700xt.

[Goblin999]

Re: XFX RX 5700XT No Display

Ok now check with multimeter on resistance mode if the side which gave the wave signal and pin 6 of the bios chip have a direct contact. should look like a short. I would say test Pin 6 again too if required.
Now this is what i'm assuming as this has reached outside my league. i would wait for someone with more knowledge to assist here.

Yes , it has resistance and quite big (6,12 mohms)

[frazerxavier]

Re: XFX RX 5700XT No Display

yes , it seems to make some waves at one corner . I marked the corner with an arrow

Ok now check with multimeter on resistance mode if the side which gave the wave signal and pin 6 of the bios chip have a direct contact. should look like a short. I would say test Pin 6 again too if required.
Now this is what i'm assuming as this has reached outside my league. i would wait for someone with more knowledge to assist here.

[Goblin999]

Re: XFX RX 5700XT No Display

photo attached

[Goblin999]

Re: XFX RX 5700XT No Display

yes , it seems to make some waves at one corner . I marked the corner with an arrow

[Goblin999]

Re: XFX RX 5700XT No Display

I have marked it in blue. one or 2 sides of the corners should generate frequency.

thanks a lot , will check it in a moment . I can see that the part has been resoldered by someone else who worked on the card

[frazerxavier]

Re: XFX RX 5700XT No Display

Still searching for that part on my board and cannot find it . I am a total begginer

I have marked it in blue. one or 2 sides of the corners should generate frequency. If some expert would comment on how to exactly test a crystal Oscillator would be great.

[frazerxavier]

Re: XFX RX 5700XT No Display

Still searching for that part on my board and cannot find it . I am a total begginer

it should be in the front of the board. likely on the left of the GPU chip

[Goblin999]

Re: XFX RX 5700XT No Display

i have added a pic in my previous message.

Still searching for that part on my board and cannot find it . I am a total begginer

[frazerxavier]

Re: XFX RX 5700XT No Display

Thanks a lot for your time and information men . I will wait to see if someone can point me out here . Cheers !

i have added a pic in my previous message.

[Goblin999]

Re: XFX RX 5700XT No Display

Don't give up yet. i am out of options here but wait for some expert to comment. You wont regret.

Thanks a lot for your time and information men . I will wait to see if someone can point me out here . Cheers !

[frazerxavier]

Re: XFX RX 5700XT No Display

So pin 8 has 3,3 V , but unfortunately there is no noise on pin 1 (tested with osciloscope) - also pin 1 has 3,3v (just measured it) . Also pin 2 and 5 both produce some weaves on the osciloscope , but unfortunately pin 6 doesn`t do anything (same as pin 1) . Unfortunately I don`t have a CH341 programmer to unsolder the chip from the board and test it out . I fear the worst that the GPU chip may be gone

Don't give up yet. i am out of options here but wait for some expert to comment. You wont regret. the CH341 programmer does not require the chip to be removed. it comes with clip which can be placed directly on top of the chip to read and program it. but if there is no clock on pin 6 then check the clock on the card with an oscilloscope. i have attached the pic of a clock for a GPU. its similar on 5700XT.

[Goblin999]

Re: XFX RX 5700XT No Display

So pin 8 has 3,3 V , but unfortunately there is no noise on pin 1 (tested with osciloscope) - also pin 1 has 3,3v (just measured it) . Also pin 2 and 5 both produce some weaves on the osciloscope , but unfortunately pin 6 doesn`t do anything (same as pin 1) . Unfortunately I don`t have a CH341 programmer to unsolder the chip from the board and test it out . I fear the worst that the GPU chip may be gone

[frazerxavier]

Re: XFX RX 5700XT No Display

Can you please confirm that I got the numbers right on the BIOS chip ? So I would know what to measure ?

I don't recollect the orientation and the image is not clear but pin 1 is the side which has the dot. Don't forget it's a dual bios. there are 2 BIOS chips. one in the front and one at the back. And there is a selectable switch.

I have added and example from a RX 580 which uses a chip from the same manufacturer.

[Goblin999]

Re: XFX RX 5700XT No Display

Can you please confirm that I got the numbers right on the BIOS chip ? So I would know what to measure ?

[frazerxavier]

Re: XFX RX 5700XT No Display

So I took some voltage and resistence check-ups and I got the following results (posted in the pictures above) . Any suggestions where to check or what to do next ?
LE : Just tested the bios pin with an arrow pointed towards it , and the osciloscope doesn`t sense anything when powering it up .

on the bios chip check pin 8 if there is 3.2V. if yes put your oscilloscope on pin 1 when powering pc on if there is noise (weird fuzzy waves) while staring up. if yes check pin 2 and pin 5. there should be some noise on those pins as well when starting up. pin 2 and 5 are used by the GPU chip to send and receive data from and to the BIOS chip. Also check if the clock is working on pin 6 with the oscilloscope. If there is VCC on pin 8 and noise on pin 1 but nothing on pin 2 and 5 or noise on pin 5 but nothing on pin2 then if you have a ch341 programmer check if you are able to read the bios chip and program the BIOS chip. (No power is required and the graphic card has to be without power). If it does not read replace bios chip. If there is no 3.2V on pin 8 check if you can trace a way back to the source of the problem. Schematic may be required if doing the first time (or some expert can help). If there is no noise on pin1 (one with the arrow or dot) then the GPU chip is not checking for the BIOS chip if available. Data is sent on pin2 from the BIOS and received back on pin 5.

My understanding is if there is VCC (3.2V) on pin 8 and there is clock on pin 6 but nothing on pin 1 (no noise) and the BIOS chip is readable by the CH341 programmer, the GPU chip is the problem. I may be wrong but I'm sure someone can throw some light here.

[Goblin999]

Re: XFX RX 5700XT No Display

So I took some voltage and resistence check-ups and I got the following results (posted in the pictures above) . Any suggestions where to check or what to do next ?
LE : Just tested the bios pin with an arrow pointed towards it , and the osciloscope doesn`t sense anything when powering it up .

[Goblin999]

Re: XFX RX 5700XT No Display

I am not an expert but if you take a look at the image at the start of the post it shows the measurements at every point on the graphic card, you can refer to these points to take measurements on your card at the same points to get a better understanding of what the card is doing. Secondly with your multi meter in diode mode test the PCIE lanes coming from the GPU. Remember they are all in pairs. It does not matter what the reading is but the reading should be in the similar range on all pairs (16 pairs in total). Check the caps on the first pair on the back connected to the PCIE lane (closest to the 12V @3.3V from PCIE. I have uploaded am image marked with a green circle ) if its present or missing. I am sure with some readings on a pic of your card someone here will be better equipped to help you. For me I had returned the card back to my friend and he sold the card so i could not continue the work on the card. You would need some kind of heatsink and thermal paste to pop on top of the CHIP when testing voltages.

Thanks a lot for the fast reply . Will be getting back on the card later today as now I am at work . I literally don`t know how to test if the GPU chip is gone or not . I was assuming that if the chip get hot is still working properly , but I don`t know much about it

[frazerxavier]

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

I am not an expert but if you take a look at the image at the start of the post it shows the measurements at every point on the graphic card, you can refer to these points to take measurements on your card at the same points to get a better understanding of what the card is doing. Secondly with your multi meter in diode mode test the PCIE lanes coming from the GPU. Remember they are all in pairs. It does not matter what the reading is but the reading should be in the similar range on all pairs (16 pairs in total). Check the caps on the first pair on the back connected to the PCIE lane (closest to the 12V @3.3V from PCIE. I have uploaded am image marked with a green circle ) if its present or missing. I am sure with some readings on a pic of your card someone here will be better equipped to help you. For me I had returned the card back to my friend and he sold the card so i could not continue the work on the card. You would need some kind of heatsink and thermal paste to pop on top of the CHIP when testing voltages.