My cpu can boot up and work without an issue for about an hour then the screen goes blank and the power button light goes from green to flashing yellow. Upon investigating the PSU I found that the fan has some issues working properly. It sometimes struggles to work and sometimes works at normal speed off and on but most of the time it does not spin at all. I have put in a refurbished power supply that I ordered from an online vendor and I get the SAME results with the new one. So I am asking if there is something on the motherboard that controls or powers the fan for the PSU and what may be wrong with it?? I have checked all cables and reseated the RAM. All others are integrated into the board. I did once get an error about the internal battery having low power so today I will get a new one. Any help would be great!! I have been working on this for like two weeks and had to wait a week for the PSU only to find the same issue. And this is not my computer so if I can get it fixed and back soon everyone would be happy. THANKS! Jason

(My cpu can boot up and work without an issue for about an hour then the screen goes blank and the power button light goes from green to flashing yellow.) Is this the Monitor light that is flashing from green to yellow ? If it is, then It is probably a Video adapter going bad..

I agree with Ghostman. In answer to your PSU fan, many PSUs have a temperature controlled fan. edit to add: I just noticed your double post on the same issue. This is against forum rules and is counter productive.

i dont think its the graphics adaptor im thinking psu is under powered or something. whats the psu? does it have some sort of queit fan technology. and whats the motherboard what i think it is or supsect is but am probably wrong is the psu has some sort of fan sensor thingy that is conected to the mboard. the motherboard is throteling the fan back the psu is then killing all power to the comp due to over heating. the the green yellow light is the monitor tells you there is no signal from the graphics card cos the powers been cut. ive not seen it used but on my mother board the board can suplie power and can sense the speed of the fan in the psu if it has a conector. but the mboard line for the fan wont throtle the speed of it so it dosent brake the psu . but if you put the conector in the wrong slot and put it for a chassie fan then the mother board would throtle it back and cause the problems you are stating. all text needs typos. There there for the reader to find,to distract them from the total lack of content. google it! wasnt the answer to the question i asked so dont be dense and give me that repl

The light that goes from green to flashing yellow/amber is on the CPU box. I know that the fan is not working properly in the power supply BUT what on the motherboard would control that if anything? As i stated i get the same results on two power supplies. --------- DC power supply: Wattage 220 W Heat dissipation 751 BTU/hr NOTE: Heat dissipation is calculated based upon the power supply wattage rating. Voltage manual selection power supplies — 90 to 135 V at 50/60 Hz; 180 to 265 V at 50/60 Hz Backup battery 3-V CR2032 lithium coin cell --------------- The power supply does have two sets of cables that connect to the board. -power connector (12VPOWER) -power connector (POWER) --------------

220W is small by todays demands. I assume this computer came with that size PSU. Have you since added additional hardware? Things like additional drives, graphics card, etc?

Is this machine under Warranty? Have you checked Dell's support site? All manuals/drivers/warranty/configuration information is there. Or, look here: http://www.support.dell.com/support... Life's more painless for the brainless.