[SOLVED] PC turns on(fans,leds work) but no post

[panosmentz]

Hi, i recently moved to another country and i had my PC shipped here. I powered on my PC and noticed that the fans and leds are working but i cannot get into BIOS. As far as peripherals, my led mouse turns on for about a second before it dies. Also the ethernet port does not seems to be getting power. So far i have tried removing the ram dimms, changed positions, tried booting with no hard drives and peripherals, did a CMOS reset and still nothing. Any ideas would be welcomed. Thank you so much!

Specs:
CPU: AMD Ryzen 5 1600
MB: ASRock AB350 Pro 4
RAM: Corsair Vengaence LPX 2x4GB DDR4 3000Mhz (CMK8GX4M2B3000C15)
GPU:EVGA SSC 1050 Ti
CPU: Corsair CX650M
SSD: Samsung 850 Evo 250GB
Case: Phanteks Eclipse P400 Window

 

[R_1]

after shipping first double check the heatsink and fan. if it came loose you will NEED to change the paste and re-secure the cooler. you CANNOT JUST SECURE the cooler.

How To - "No POST", "system won't boot", and "no video output" troubleshooting checklist

"No POST", "system won't boot", and "no video output" troubleshooting checklist This checklist is a compilation of troubleshooting ideas from many forum members. It's very important to actually perform every step in the checklist if you want to effectively troubleshoot your problem. 1.Did you...

forums.tomshardware.com

this is the no boot troubleshooter go down the list and check.
step 17 the diagnostic speaker is very helpful if installed.

 

[panosmentz]

Hey guys,
Just an update, the heatsink is fine. I tried another PSU and RAM(all slots) still nothing. After about 10 seconds PC keeps restarting on a loop. At this point I truly believe that it's the motherboard that's dead. It supplies power to the CPU, GPU and fans but it won't post. Probably a short circuit somewhere or a capacitor that's dead. Is there anything else I can try before pulling the trigger for a new motherboard? I think the only thing that's left is a beeper and another CMOS battery.
Thank you for the replies.

 

[R_1]

canned diagnostic speaker rant: speaker making 101
The diagnostic speaker is the motherboards main diagnostic feedback device.
the motherboard may be telling you where the problem is.
my speakers have this plug
http://images.crutchfieldonline.com/graphics/infolib/homelib/hSpeakerSpringClip.jpg
I use lamp wire but any stranded wire will do. literally any stranded wires. strip one end like so
http://www.antiquelampco.com/Shades/CordColors.jpg
attach the stripped end into the speaker spring clips on the speaker.
the other end of the wire should be trimmed like so the semi strip
https://wesbellwireandcable.com/images/cutwire.png
by doing a semi strip the wire case is now the socket.
plug one wire to the first pin, and the second onto the fourth pin.
power on the system and listen for beeps
end canned rant

bodge together a speaker if you can. see if there are any beep codes.
if you get the speaker connected and cannot get any beeps, try to force a beep. remove ALL the RAM and try to boot the system, pretty much every motherboard has a no RAM beep code. if you cannot force a beep code.
you can test the battery by checking the time in the BIOS. unplug all power from the board for a half an hour, reconnect power and check the BIOS settings. if they did not revert to defaults with no AUX power connected the battery has enough power to do the job.