a mi me salia este mismo error, le cambie la bateria y cambie la memoria ram a los puertos negros .....y se me activo una sugerencia que muestra en f1 azul....presione f1 y listo me mostro la secuencia de la bios para poder formatearlo...espero les ayude a los que le ocurra....!!
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Obviously this is a pretty old thread now but I have had a successful result today and thought I would share in case anyone is still struggling with this issue. I have a mate's HP Compaq dc5750 Small Form Factor desktop which had stopped working a couple of years ago (not certain what symptoms) and he just put it away in storage until asking me to take a look at it recently. Initially I could not even get a POST beep or graphics display so I pulled everything apart to get the hard drive out, ascertained on another computer that it was perfectly OK so I then replaced the CMOS battery, cleaned the contacts on the memory, cleaned off the old thermal paste on the CPU and replaced it with new, re-assembled and at least got POST beep and display, but with the error message stating that hardware had been changed or that the Real Time Clock needed to be replaced. The HP instruction to hold down F10 while booting and then to go into Setup did not work - it still hung on the error message. I then downloaded the HP manual for this model and realised that I had the 2 memory DIMM's in the white slots which was wrong according to the manual, (not sure if it was in those slots when I pulled it apart). Anyway, to cut a long story short, I swapped the DIMMS to the two black slots (XMM3 Channel A and XMM4 Channel B ) which apparently have to be populated first and voila, when it booted it allowed me to use F1 and save the settings. I was then able to boot into the Windows installation and everything worked perfectly. Whilst the clean and refurbish may have done some good in the way of regular maintenance, I'm thinking that it was the memory which was the main issue because as soon as I switched the DIMM's everything worked as it should.I don't know if this is the only answer but it worked for me so I'm happy - and my mate will get all his data and programmes back intact! :-)
hi ..been havin the same problem as this.. i have changed the cmos battery and the ram is sitting at the black dimm. but when boot it there is no display at all.. before replacing the cmos battery i take out the old battery and try boot it and got boot into bios and i reset to default.. then after saving it the system restart and it just blank.. then i put the new cmos and its the same just blank screen when i boot it