dc5750 won't enter setup

[johnm76]

I bought a tested working replacement dc5750 motherboard (with original AMD 3800 X2 CPU and heatsink still installed) and have it running on my test bench with just a CPU fan and a non-oem 400W power supply attached - no add-in cards, drives, USB devices, etc. It powers up fine and gives error messages for configuration and missing usb/sound/fans. If I press F1 as prompted to save the new configuration, nothing happens at all. If I hit F9, F10, or F12 instead, I do get a confirmation in the bottom right corner of the screen (like SETUP if I hit F10) then nothing else. It's not locking up hard - I can hit ctrl-alt-delete at any point to reboot. 

I tried clearing CMOS, removing the battery, clearing password using the green jumper - nothing helps. I searched for similar problems but only came up with issues involving lock ups at or after the spash screen or entering windows - I'm not getting that far. Thought about installing it into the case (with all proper headers and fans attached) to see if that helps, but really don't want to rip apart the PC until I'm sure this board works.

Am I missing something obvious, or will this board simply not boot when not installed in the case?

Thanks - John

[johnm76]

I bought a second board/cpu combo that finally came in today, and it's doing the exact same thing.

Can anyone let me know if this is normal behavior for a dc5750 SFF motherboard? 

Will installing it in the case (with all fans and headers attached) with the original power supply somehow let me enter setup?

Thanks in advance for any help or suggestions. -John

[fpresiado]

might be curropt bios. if you can get into windows try downloading the latest firmware update for the bios. also changing the jumpers wont make a drifference what u have to do is change jumper remove the batt power on the comp. comp wont turn on this is because the jumper is clearing the cmos. now change back the jumper put battrie in and install the latest bios update. if this dosnt work you might have a mem cpu psu or mobo problem. you can do a test on all parts of the computer besides the psu. first remove cpu memory battrie hard drive cables fan connections then power up comp should hear beeps indacating battrie or cpu is not connected. you should read the manuel on hp website for the beep codes. first might be battrie for beep codes, put battrie back then power it up again should hear the beep code for cpu, after that put cpu back in then power it on should be for memory then put memory back in. if all is good then it might be power supply

[Big_Dave]

John,

Your new PSU probably doesn't support fan signaling.  It's an issue when older PSUs get replaced with a newer PSU.  You might find an option in the bios to deal with the issue but then that just might turn off the fans.

[johnm76]

Guess I'll post an update since this thread seems to have come back to life.

It was the RAM. The board was very picky about the placement of the RAM for the first boot. I switched to a single DIMM, and tried all 4 slots, clearing CMOS between each try. It finally booted fully into setup, and I was able to add the rest of the RAM (filling all 4 slots) and reboot without issues. Guessing it's something to do with SPD and the board automatically trying to determine dual-channel mode.  Funny, since once I got it going it had overall excellent RAM compatibility - I was able to run all sorts of speeds, sizes, brands, and even high/low density sticks.

So if anyone else has a similar problem, drop down to a single stick of memory and try all 4 slots until you can get into setup. If you still can't boot, the board probably does not like the RAM. Clear CMOS and try again or try a different stick.