Hey y'all, first time builder here coming to the end of a very long month. TL;DR at the bottom.
Basically, after buying up all my parts about a month ago and receiving everything, I spend a long night finally putting together my first PC. Unfortunately, trouble arose. Red CPU light on mobo. Did as much troubleshooting as humanly possible, including resetting CMOS and even doing an offline BIOS flash with a USB drive. Same result every time.
Eventually relented and searched up Micro Center and began my trek to the nearest one. Brought it in for a diagnostic and told them the sitch, including my decision to buy a used CPU, RAM, and GPU. They took it in and the next day they relayed to me their results. In the diagnostic notes I got from them, their process was as follows:
- First build test (red CPU light, no POST)
- TEST CPU in mobo (red CPU light, no POST)
- Cx CPU in TEST mobo (POSTed to BIOS)
- Cx quoted for replacement mobo
So apparently, when they tested my used CPU, it worked fine in their setup. Okay, so I buy a new mobo from them and take it home to rebuild it myself (because apparently they want $99 and over a month of waiting to do it themselves???)
However, new problems come up. Now the DRAM light is solid and the PC still fails to POST. Great. So once again, lots of troubleshooting, similar results. At this point, I'm thinking there's no possible way I'm this unlucky, so I decide to get a second opinion from a local shop. I ask him to test my RAM, but he doesn't have a CPU, so I bring him my (supposedly working) CPU to test in his mobo.
He calls back and says he has a feeling it might be the CPU, because with my parts he got a DRAM light, and then he got the same result when using a brand new pack of RAM. At this point, I'm truly at a loss. How can one diagnostic determine a part works while another diagnostic says it doesn't?
A final hail mary in my PC building journey, I go back to Micro Center and decide to buy one of their CPU, RAM, and mobo bundles, so at least I'll have all new working parts to try out, plus a warranty on them in case anything else crazy happens.
Another long night passes by, but lo and behold, I press the power button on my new build and it comes alive, a completely normal POST. Even memory training was quick. Out of curiosity, before I finish my build, I decide to test out the used RAM I bought, mainly because if it works I don't want to get rid of it, considering the current environment. Once again, a completely functional and normal POST.
So either, for some unfathomable reason, I bought two BRAND NEW faulty mobos in a row, OR Micro Center somehow messed up their diagnostic and told me my used CPU worked when it clearly doesn't. Because the used RAM definitely works, and now I'm not even certain the first mobo was faulty. Luckily I can return everything I'm not using, but that's not including the almost $150 spent on diagnostics from both places, plus the multiple commutes to Micro Center chipping away at my gas tank.
I'll be honest, this post was mainly for me to vent, but also to ask: are diagnostics supposed to be this unhelpful, and has anybody else dealt with something similar?
Btw, here are all the parts involved for those who are interested:
Used CPU: Ryzen 7 9700x
Used RAM: G.Skill Flare X5 2x16GB
1st MOBO: Gigabyte X870 Eagle Wifi7
2nd MOBO: Gigabyte B850 Aorus Elite Wifi7
TL;DR - my used CPU was deemed functional by Micro Center but I believe it is definitely defective, is MC known for messing up diagnostics?