No diagnostic beeps

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   Having trouble with a B450M Pro4 that won't boot. No video and weird USB (keyboard/mouse) behaviour. Frustratingly I'm not getting any diagnostic beeps (I have a speaker connected to the spk pinouts). I had read that the default setting in the bios is for the beeps to be disabled. If so, how do I enable them without access to the bios? Or is this board just fully fried?

Have gone through the full list of diagnostic steps including a hard cmos reset and swapped most components.

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jdk Members Profile Send Private Message Find Members Posts Add to Buddy List Newbie Joined: 27 Jun 2022 Status: Offline Points: 65	Post Options Post Reply Quote jdk Report Post Thanks(0) Quote Reply Topic: No diagnostic beeps Posted: 27 Jun 2022 at 6:38am
	Having trouble with a B450M Pro4 that won't boot. No video and weird USB (keyboard/mouse) behaviour. Frustratingly I'm not getting any diagnostic beeps (I have a speaker connected to the spk pinouts). I had read that the default setting in the bios is for the beeps to be disabled. If so, how do I enable them without access to the bios? Or is this board just fully fried? Have gone through the full list of diagnostic steps including a hard cmos reset and swapped most components.

Xaltar Members Profile Send Private Message Find Members Posts Add to Buddy List Moderator Group Joined: 16 May 2015 Location: Europe Status: Offline Points: 30703	Post Options Post Reply Quote Xaltar Report Post Thanks(0) Quote Reply Posted: 27 Jun 2022 at 11:02pm
	What are the specs (including PSU model)? Is this a new issue on a previously working system or a new build? What (if anything) caused the issue?


jdk Members Profile Send Private Message Find Members Posts Add to Buddy List Newbie Joined: 27 Jun 2022 Status: Offline Points: 65	Post Options Post Reply Quote jdk Report Post Thanks(0) Quote Reply Posted: 28 Jun 2022 at 11:54am
	New build. PSU is known good. Tried multiple GPUs. CPU and ram could theoretically be bad but confused as to how they'd cause the symptoms seen here. Base question though: why am I not getting any beep codes? Are they indeed turned off by default? (I get the boot beep being off but diagnostic beeps in case of a fault should really always be on).

miffril Members Profile Send Private Message Find Members Posts Add to Buddy List Newbie Joined: 30 Jun 2022 Status: Offline Points: 50	Post Options Post Reply Quote miffril Report Post Thanks(0) Quote Reply Posted: 30 Jun 2022 at 5:00am
	You PC restarts every 30 seconds or so?

jdk Members Profile Send Private Message Find Members Posts Add to Buddy List Newbie Joined: 27 Jun 2022 Status: Offline Points: 65	Post Options Post Reply Quote jdk Report Post Thanks(0) Quote Reply Posted: 30 Jun 2022 at 2:20pm
	Nope, never starts at all, and no apparent restart cycle. Looking like it may be an RMA. Still confused as to why no beep codes though.

Xaltar Members Profile Send Private Message Find Members Posts Add to Buddy List Moderator Group Joined: 16 May 2015 Location: Europe Status: Offline Points: 30703	Post Options Post Reply Quote Xaltar Report Post Thanks(0) Quote Reply Posted: 30 Jun 2022 at 3:39pm
	Generally no beep codes = bad. As far as I am aware the "disabled" setting in the BIOS only disables the POST beep. Errors should still cause a beep code.


jdk Members Profile Send Private Message Find Members Posts Add to Buddy List Newbie Joined: 27 Jun 2022 Status: Offline Points: 65	Post Options Post Reply Quote jdk Report Post Thanks(0) Quote Reply Posted: 01 Jul 2022 at 3:25am
	Thanks for that Xaltar. Definitely confirms there's something wrong with the board itself then.