HP ML110 G6 won't boot unless the CMOS is reset

[seanc]

Hi all,

I have a HP ML110 G6 that won't boot unless the CMOS battery is removed and re-inserted.
The next warm reboot, power cycle or cold reboot, it will fail again.

The beep codes it gives is 1-1-1-2 which seems to correspond to nothing.
I've replaced the CMOS battery with a new one, just in case.

Genuine HP memory has been tried, it makes no difference.
The CPU has been swapped, it doesn't make a difference either.
The above are verified working in that machine as when you can get it to POST, it will quite happily sit in the BIOS.

I've managed to re-flash the BIOS and BMC with no luck.
The Integrated Lights Out (BMC) always works and doesn't detect any issue with the hardware.


There are only two electrolytic caps on the motherboard (Sanyo), the rest are poly caps.

Does anyone have any thoughts?

Sean.

[Wester547]

Re: HP ML110 G6 won't boot unless the CMOS is reset

From research, this board does actually have Sanyo (Suncon) SMD electrolytics (some of which are easy to identify with the presence of a vent stamp) which may appear to be polymers. This may seem like a dumb question but does it work if you leave the CMOS battery out (which would reset CMOS upon each boot up, after you remove and reapply AC power) ?

A bad chipset is a possibility. A SMD transistor critical for proper operation of the CMOS battery, around that area, could be bad as well.