Assistance with diagnosing 1080 ti - Page 1
Forum section: electronics / repair

author: tooeasyforkevin
author_rank: Newbie
timestamp: December 04, 2018, 03:53:13 am
content: Hey all, I recently took on a project of trying to repair my 1080 ti. I'm very new to electronics repair and have basic knowledge of soldering but not much, but I'm trying to learn. I've watched almost every youtube video I can find on GPU repair but there's not many, especially in english. Luckily I found this forum and hopefully you guys can help. When I boot with the card, the computer does not POST; however, the GPU gets power I'm assuming because it heats up and the fans spin. All the videos I've watched seem to be based on repairing a short and I'm not sure that's the situation in my case? So far, all I've been trying is measuring resistance across the capacitors to no avail. Attached is a reference picture of the PCB im working with.Thanks for any tips

author: Rasz
author_rank: Super Contributor
timestamp: December 04, 2018, 10:57:28 am
content: Quote from: tooeasyforkevin on December 04, 2018, 03:53:13 amsell as 'broken not posting', should easily fetch ~$200-300, buy another used one for $600, move onQuote from: tooeasyforkevin on December 04, 2018, 03:53:13 amget a box offreebroken laptops/computers from your local recycling center, you do not start learning on $300-1000 piece of equipment

author: DaJMasta
author_rank: Super Contributor
timestamp: December 04, 2018, 06:08:21 pm
content: You've picked a very difficult (to diagnose and repair) first job, so I'd also advocate for selling as broken and moving on to a new card. The fans spinning could just be that the card's fan controller is coming online, I wouldn't count on heating unless it's changing fan speed as it boots. No output could be full on non-functional (power supply, GPU itself, interface circuitry, memory), could be just output related (transmitter chips, broken solder joints), or could even be related to the power supply or the motherboard connected to it.If you really, really want to attempt it, you have to start gathering information, and without some tools it will be difficult at best. Swapping for a different card will help verify external parts, swapping to a different monitor could verify it's not just one output gone dead, a thermal camera could verify heating and pinpoint obvious shorts, a multimeter could help locate shorts (as you've used) or could test power rails when powered up, but probing such small chips means a slip could short an output and smoke something else.Basically, on a board like this, you have a ton of things making it work against you:Very little documentation for the chipsNo schematicVery little availability for replacement partsVery fine pin pitchMany layers of connectionsHigh speed interconnects requiring expensive equipment to monitorFairly high density of partsIt's a perfect storm of new-to-repairing unfriendliness.

author: tooeasyforkevin
author_rank: Newbie
timestamp: December 05, 2018, 04:21:16 am
content: Hmm thanks for the replies guys. That's what i was afraid of. I guess I'll try tinkering for a few more days before throwing in the towel and listing it for sale. Too bad a lot of the videos on YouTube are in what I assume is Russian.Once again, I appreciate it!

author: Rasz
author_rank: Super Contributor
timestamp: December 05, 2018, 05:52:04 pm
content: Quote from: tooeasyforkevin on December 05, 2018, 04:21:16 amand how would that help? equipment alone to repair modern graphic card will run you more than replacement