Question PC not booting up - B350 Tomahawk / Ryzen 1200

Jan 23, 2020
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Greetings everyone



My PC has been working flawlessly for 1,5 year now. Today I swapped my GTX 1050ti for 1060. Everything was working ok, then I swapped back to 1050ti to run some benchmarks and make sure everything is ok with it before I sell it. I put it and turn on the pc, but forgot to plug in the power 6pin cabel, so I had to shut down the PC. After I plugged the 6pin cabel and turn on PC, I don't get any display and my keyboard and mouse LED's don't lit up, so I assume they don't work. Every system, CPU and GPU fan work, also LED's on motherboard and GPU work fine. The EZ DEBUG led's lit up in that order:



1. CPU and DRAM ON at the same time

2. CPU and DRAM OFF at the same time

3. CPU ON, then DRAM ON.

4. Both OFF at the same time



Then points 3 and 4 repeat a few times.



What have I tried to fix it?



1. Tried with one memory stick at the time. I tried both memory sticks, it didnt help.



2. Reseted CMOS by both removing battery, then shorting CMOS pins



3. Unplugged every drive and USB device excluding mouse and kb.



4. Tried both graphics cards.



Nothing has helped. I assume that either MOBO or PSU is not working properly.



Can I do anything else to fix it?



My PC is:



MOBO: MSI B350 Tomahawk

CPU: ryzen 1200

GPU: Msi GTX 1050ti / Zotac AMP GTX 1060 6GB

PSU: bequiet System Power 8 (500W with 80 Plus)

DRAM: Patriot Viper 2x4GB 3000MHz
 
most likely the old PSU is gone

you can try unplugging the PSU, push the power button of the case for about 20seconds, then replug power and try booting. Let the PC do reboots for about 5 cycles.

Check all connections and cables again
 
Jan 23, 2020
2
0
10
0
most likely the old PSU is gone

you can try unplugging the PSU, push the power button of the case for about 20seconds, then replug power and try booting. Let the PC do reboots for about 5 cycles.

Check all connections and cables again
I was also thinking it has something to do with PSU. What do you mean by unpluging PSU? Unplug 24pin cabel from the motherboard?
 

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