Search results

Good to know thanks. I'm on long shifts rest of the week so I'll give back to the board Friday at the earliest.

Thanks, I'll check. Out of curiosity, does the 3.3v enable signal for each of the controller ICs usually have the same source?

Hey, that's right, I've re-marked it here for clarification. I'll re-check the traces tomorrow and get back to you. Last I checked, one (either tach or pwm) appeared to go to the area highlighted at the top, and the other went to the right side of the board, with one of them also showing...

A quick check of the Vcc and EN on the 2 MP8633A chips shows they don't have Vcc or EN. My only original find with this card was that on the left side of the card, the inductor you marked as 9 showed a short (or what I can only assume is a short). Re-checked it today and it shows 11.7 ohms. I...

Hi all, been trying to get into electronics repair recently, it’s always something I’ve wished I was good at. I’ve been trying to get into GPU repairs recently and have picked up the above card from eBay. The seller was selling because it wouldn’t load driver in windows after he shorted the fan...

Not sure if this helps or not, but I've been probing around IC MP2888A - the datasheet says it's the multi-phase PWM controller. I thought it might provide a pgood signal to the enable pin on the other ICs on the left hand side but probably not as it controls the VRM phases form what I can...

So voltage wasn't initially checked at pink lines, but showed continuity with system off and GPU on my desk. I've checked and updated the voltages - some pink lines actually carried 3.3 V and I've changed them to yellow. Also, the component on the back of the board that received 3.3v from the...

Not much more luck with 5V so far, but have updated the 3.3 v connections. Not sure how helpful it is. For the most that area seems connected up. Not really sure where to go from there though. (I've marked some lines pink because I don't actually get 3.3v there but it's connected via the...

I'll have to test more on 5v, but here's what I have so far.

I've gone ahead and checked the resistor - 3.3v either side, 0 ohm approx. Pics 1 & 2 - checking for continuity - the component on back of board shows continuity to a component on front of board (pin showing continuity is not the same pin as shows continuity with the resistor). Pics 3 & 4 -...

This resistor here? I'll check in the morning and report back.

Thanks, I wasn't too keen on trying to find the short on memory rail either as like you said it seemed to go to a lot of places on the board, so I'm very relieved as well! Okay so here's what I have for the inductors you labelled in the above pic. 1 - 12.05 V 2 - 12.05 V 3 - 12.04 V 4 - 0 V 5...

So I've finally had time this past weekend to get back to working on this card. First, regarding point 1 you asked me to measure before, I was measuring to the ground pin on the capacitor so was reading resistance to ground. Resistance to the positive pin of the capacitor measures 25.6 ohms...

Ahh shucks. A microscope will be out of the question, the labs are swamped right now with this pandemic. I did use a pair of magnifying glasses I have lying around to do an inspection a couple weeks back, and there was no obvious damage. I've got a power bench supply at home, I could try and...

The shunt measured around 0.4 ohms, and it's now back on the board. 1 - 1.0 ohm 2 - 0.9 ohms 3 - 14.8 kOhms 4 - 3.12 kOhms 5 - 81.8 kOhms 6 - 10.2 ohms Edit: before my probing incident, the ohms from Vmem to ground were in the 20's, so the 1 ohm appears to be new. EDIT #2: ignore the above...

Shunt at: J8 adjacent to 12v from PSU Right = 44 kOhm Left = 36.7 kOhm J11 adjacent to 12v from PSU Right = 9.04 kOhm Left = 9.24 kOhm Shunts were still on the board when I took these readings if that changes anything.

Yes I meant the R005 shunt not the resistor I accidentally probed. Right side of shunt to pin 2 - 0.6 ohms Left side of shunt to pin 2 > 2 MOhm Right side of shunt to ground > 2MOhm Left side of shunt to ground - 13.3 kOhm Regarding the 2MOhm readings, I note they occasionally start rising to...

You're being too modest...I've read your posts and seen one of your YouTube vids. Thanks for the advice. I'll have to check properly this weekend as I'm on nights this week (I'm a doctor by trade). I did manage to remove the resistor with hot air and there appears to be several kilo ohms of...

Thanks, to be honest this is more of a learning thing for me at this stage, and we're still probably several months away from reasonably priced and available GPUs. I am a bit worried about power getting dumped into the VRM as you said, I thought I'd find a short circuit to verify this, but all...

So I've got an ASUS ROG Strix 2080 that doesn't work. The LEDs on the housing come on but there are no other signs of life and I thought this GPU would make a good project to learn electronic repair - I've been trying to get into this for some time. I could really use some help as I think I'm...