Hot LDO Cyberpower/ASRock B360m Extreme/Pro4

nubie

Senior Member

Join Date: May 2010

Posts: 63
#1

Hot LDO Cyberpower/ASRock B360m Extreme/Pro4

11-17-2023, 08:53 PM

I have 2 hot LDO on this motherboard. It is an OEM ASRock B360 Pro 4 for branded "Xtreme" for CyberPower (they just left off a bunch of stuff, rear IO, second front panel USB3 etc).

I'm getting no POST, and a couple of hot LDO; RT8059 and UZ2085G. Any idea what to check, all caps in the area for shorts?

If you have schematic or hints I would be most happy to hear them. Thank you.
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piernov

Super Moderator

Join Date: Jan 2016

Posts: 4435

Country: France
#2

11-19-2023, 05:58 AM

Re: Hot LDO Cyberpower/ASRock B360m Extreme/Pro4

Resistance to ground on outputs of the regulators. Probably bad PCH anyway.
Also RT8059 is a buck converter with integrated MOSFETs not an LDO, but doesn't change the situation here.

OpenBoardView — https://github.com/OpenBoardView/OpenBoardView
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Hot LDO Cyberpower/ASRock B360m Extreme/Pro4

Hot LDO Cyberpower/ASRock B360m Extreme/Pro4

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