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What I measured was this continuity in this connector if it was bad, but I have not measured any signal.I measure any signal? pin 15=0v pin 19=5v pin 20=5 l9400=0v

hello this board does not recognize hard drive in disk utility, this measures PP0V9_SSD_FIXED=0v PP0V9_SSD_REG=0v PP1V8_SSD_COLD : 0v PP1V2_SSD_HOT: 0v PP1V8_SSD_HOT=0v...

this board only turns on smc bypass mode, could you help me by telling me where to start measuring for this damage

ok, this is video https://youtube.com/shorts/CoW_wF8nA_M?feature=share, I don't have a video card to test in good condition :( , according to your experience, this damage is caused either by vram or gpu chip usually

How the problem appeared? I don't have that information, I don't have customer contact Can you post some pictures? I have a video that I post to you in such a case it is possible to diagnose a bad vram module, or is it changing each module and testing and which one fails?Is it best to change the...

Hi, I have an imac 27 that has lines vertical blue, red, then try to start system but it gets white screen, I thought it was a video chip, I did reballing, but the same problem continued, so I changed the gpu chip 216-0811000 and the problem continued, I also tried external video, it stays on a...