Showing results for 
Search instead for 
Did you mean: 
New member
1 0 0 0
Message 1 of 2
Flag Post

3.4 beeps in all in one business pc

HP Recommended
hp all in one pc
Microsoft Windows 10 (64-bit)

The system board displays a power failure (crowbar).* 3.4 beeps.replaced the new motherboard still facing same issue.same issue found in 6 nos pall in one pc


Level 12
7,692 7,654 332 704
Message 2 of 2
Flag Post
HP Recommended


Just to be sure...

You get a LONG (MAJOR) signal category, RED LED &

then a SHORT (MINOR) signal category, WHITE LED.

Major – the category of the error; Minor – specific error in that category

The AUDIBLE repeats 5 times, and the VISUAL until power is removed.




The Main-Board displays a power failure (crowbar).*


Indicates potential power system failure.

1 Reduce to minimum config (CPU, Main-Board, PSU,

Single memory DIMM) and isolate failed component.

2 Reduce further if issue persists.

3 Test known good PSU.

4 Replace affected component.

5 If unable to confirm source, replace CPU, Main-Board, PSU.


So you eliminated the PSU and CPU? The memory module also passed?



0 Kudos
Warning Be alert for scammers posting fake support phone numbers and/or email addresses on the community. If you think you have received a fake HP Support message, please report it to us by clicking on "Flag Post".
† The opinions expressed above are the personal opinions of the authors, not of HP. By using this site, you accept the Terms of Use and Rules of Participation