Question Gigabyte B450M DS3H Rev1.0 not turning on

[MichaelYuc]

After my motherboard Gigabyte B450M DS3H Rev1.0 is turned off all night it wont start in the morning. Then I disconnect the power and wait a few minutes or hours and it does finally start.
When I do this I do not move anything on the cables or parts, do be sure it will in the same state like when it worked.

I had this problem last year and somebody told me to change my voltage regulator, so I bought an CDP No Break and it worked for about 10 month.
But last week it started all over again.

I checked the PSU and it sends power do the motherboard
I reset the CMOS
I tried to jump start it (not working)

The problem is only when the PC wasn't running for example 8 hours, when it was turned off for 4 hours (still warm) it starts normally.

Any thoughts what could it be?

PSU: EVGA 600B 80
Ryzen 5 2400G with Radeon RX Vega
RAM: 2x Adata XPG DDR4 2400 8GB
SSD: Kingston Hyperx Savage 240GB

 

[JohnBonhamsGhost]

include power supply age / time in use.

Ryzen 5 2400G with Radeon RX Vega

do you mean the onboard iGPU or a dedicated RX Vega graphics card?

 

[MichaelYuc]

include power supply age / time in use.


do you mean the onboard iGPU or a dedicated RX Vega graphics card?

It's a AMD Ryzen 5 2400G with Radeon RX Vega Graphics 4 Core 8 Thread 3.9 GHZ Processor

Power supply age are about 4 year.
Motherboard are 3 years old

 

[MichaelYuc]

Ok, I changed today de battery, let`s see what happens tomorrow.
Also I installed a 2. cabinet ventilator.

 

[MichaelYuc]

Yesterday I updated the BIOS and I didn't turn off the No Break. PC started today without a problem, let's see tomorrow.

 

[MichaelYuc]

PC didn't start today, tried with an other PSU and it didn't start either. Disconnect power cord for 2 hours and then it started.

Now I think it is the motherboard.