Hello, i just put a 1N4148 but no improvement. The unit still shows Bank 7 Preset 777 right after i switch the device on without kind of loading process. Power rails look correct. I hope it's not dead. I m going to find out....

Hello ! just an update, so yes i had to jump solder the pcie riser to allow the PERST high state. So yes i fixed the card.... kind of cauz it boots normally with a lab psu and also inside the pc. Unfortunatly, the graphic card won't show any signal in the monitor even though fans are spinning et pc starts normally as test leds on the mobo process correctly. VGA led does not stay lit. So bad, im wondering if the bios is still in good condition after the few restart i made with the card alone during the troubleshooting. Monitor and hdmi are the same i used before when the rx580 was working.. i don't...

Hello,

im actually trying to save a d1500 delay from yamaha. I found the service manual but schematic is missing and BOM list is a bit unclear as components listed have no reference linked to the pcbs... In my case, one zener diode was broken (114 code on the pcb in attached file) and couldn't be repaired : it was a zener type package. In the BOM list i found 3 reference on this board : 1S555 (can be replaced by 1N4148), RD4.7EB2 (approx 5v rectifier), RD7.5EB3 (approx 7v rectifier)...

Actually the cathode goes to VCC of sram M5M5118P, without this diode missing, i have...

Hello, thank you for your help. After looking around with my multimeter, Perst signal is going from PCIE pin to the U4513 logic... Now it makes sens, the fact im using a riser make some voltages as the Perst signal not present when it would be present if i was using a true motherboard ?

In this case, i dont understand why in the first place i couldn t get the board botting up when connected to my pc motherboard... Unless U1000 or U4513 was faulty since the beginning.

Just tested u4513, he s fine. Now i really dont understand why by forcing high state from u1000 to the...

Hello,
unfortunatly i didn't findthe right schematic for a Sapphire pulse RX580 8gb, the only schematic i found is called "rx580V341" and it shows as the screenshot attached. On my board there is no U100 and also the PERST signal is coming from te PCIE from the motherboard ? That could explain many things but it does not explain why my gpu stopped working since i put the 1K resistor it booted up very find for few months... unless doing that damaged the NCP81022, but having my Vcore 900mv right is strange if the NCP was bad it should not i guess....

Regarding to the schematic, the logic and gate is as attached. In my case, 3.3v is at pin1 but nothing at pin 2 even though it happens i do have 3.3v at pin2 randomly.

May be you have the schematic where your informations come from to compare ?

About touching the gpu is only by touching slighty the metal case of the gpu chip not the center core. I do not push at all so it doesnt look like a reballing issue.

Regards...

Hello,

im french young electronic tech, previously welder/construction diver. I was lucky enough to work in Australia and NZ few years but had an accident at work and had to go back to my country and find a new carreer path. During the healing process, repairing everything that is broken became an addiction and i love learning about electronics since. It's a really long road with lot of frustrations sometimes but it s the way i picked for the rest of my life and at least my back is safe now .. cheers !

Hi,

Im actually trying to find what is going wrong with my sapphire Pulse RX580 8gb... I purchased it used and supposely dead a year ago and found out (thanks internet) that U1000 (And gate sot23-5) was not giving me the high state to the power management IC NCP8122...

At this time, with no spare parts, i decided to put a 1kohm resistor to create the voltage as commented by a guy named Lorkur on this forum ([URL]https://*******/viewtopic.php?f=48&t=122873[/URL]), you ll need to translate it in english.

and voila ! the gpu worked again and i didn't care...

Hi Guys,

I just replaced 2 blown fuses on the 12V rail of a RX580 sapphire 8go even though i didn't find any sign of shorts on the 5V, 3.3V or 12V with my multimeter. I don't know the history of the card..

i followed step by step the video from TECH Cemetery ([url]https://www.youtube.com/watch?v=supu7YeNTfw[/url]) but when on his RX580 sapphire 8go he doesn't have VCORE mine does but won't turn on .. I watched many video but i don't find same situation i m facing. So im clearly lost because all measurements steps i did on the GPU are fine. I have a B550m, a 550W...

Hello guys,

im actually trying to wake up a non powering up gpu, model RX580 Pulse 8gb. I have a multimeter and 3 lab PSU. I mention 3 lab psu because i don't have mobo so here is the situation. I followed step by step the video from here ([url]https://www.youtube.com/watch?v=supu7YeNTfw[/url]), he does another one about the 1.8V regulator possibly guilty, In both scenario, as me, No vcore voltage but no short anywhere. But in his case he s plugging the gpu to his mobo and the 8pin connector as well when for me, for the moment as i don't own mobo, i just inject voltage from the 12V...

Re: New Members - please post your introductions here

Hello Guys,

Im new here. Im young electronician with lot of knowledge to build and fell recently into the goal of building my first pc with broken devices that i will repair and proudly mount into my first build. The road is difficult but it's what is enjoyable at the end.