Gigabyte GA-Z170X-UD3 no post

[alderick]

Hi guys,

Recently my main desktop just die in the night (I shutdown before sleep), no idea why, already buy a new MB and CPU so nothing hurry.

The PC try to start but no post and code 49 on MB debug digit thingy.
The PCH is hot, CPU cold, 20W on main plug.
On PCH package there is some cms caps, 1.32ohm is it normal?
If i bring power on rail one by one, both 5V and 5v stb take power, ~0.6A.

Any idea or thing to check?

Thanks a lot.

Edit: I did backup M_BIOS and after copy B_BIOS into M_BIOS chip, without any change

[dicky96]

Re: Gigabyte GA-Z170X-UD3 no post

Does the PCH get hot when you have only standby voltage (before starting the ATX PSU)?

Do you still have 1.3 ohms on the PCH capacitors with the CPU removed?

If the answer to either of these is yes, then the PCH is fried

[alderick]

Re: Gigabyte GA-Z170X-UD3 no post

Hello, thank you for the answer.
Without CPU same 1.3 ohms, and with only standby, it takes 3W at main socket, PCH warm but not as much as when I try to start MB.

PCH fried anyway so.
Can't change that thing, I should trash it I guess.

[taxxin]

Re: Gigabyte GA-Z170X-UD3 no post

Hello, thank you for the answer.
Without CPU same 1.3 ohms, and with only standby, it takes 3W at main socket, PCH warm but not as much as when I try to start MB.

PCH fried anyway so.
Can't change that thing, I should trash it I guess.

yes you can change it, I failed mine because i lifted the chip along with its trace pad. you can click the link below 990fx failed southbridge in my signature

[alderick]

Re: Gigabyte GA-Z170X-UD3 no post

I removed the PCH, the short on MB is gone, so it is fried like you said.
Since I don't have a BGA rework thingy, I'm gonna trash the MB.

Case closed, thanks for help.