My E520 Dell shuts down in to the energy save mode after 1 minute of booting and then the high speed fan comes on and screen goes black

SOURCE: My Dell Optiplex GX270 goes into power saver mode

this sounds like a bad power supply unit. First check that your Ram and graphics card a free from dust and dirt by removing them from their slots and cleaning them with a dry soft paintbrush then replacing them gently but firmly. Next check that all of the power cables going into the motherboard are pushed in gently but firmly. If this is done and you still get the same problem, then I suggest changing the power supply unit.

SOURCE: cpu fan failure message when booting

The CPU fan and assembly is easy to replace, but proprietary. You will have to purchase from Dell.

Go to their spare parts purchase site here:
http://accessories.us.dell.com/sna/DellPartsFamily.aspx?c=us&cs=19&l=en&s=dhs&redirect=1

You can download the service manual here:
http://support.dell.com/support/edocs/systems/dimc521/

Let me know if you have questions.

SOURCE: Dell GX280

Same problem... orange power light, fan starts slow and builds up to very high speed.
I removed my video card and SIMMs --> it beeped on boot and the fan did not speed up.
Put one SIMM back in --> booted fine, pressed F2 to view BIOS. Memory reported fine.
Put all SIMMs back in --> all fine now.

SOURCE: CPU fan runs at high speed and won't boot

Change the setting in the BIOS menu. reboot your computer.. when you see the dell logo.. press F1 (or F2 if F1 doesn't work) button until you see the BIOS screen. Check for fan options and change it

SOURCE: Dell Optiplex GX280 -ABC LIGHTS LIT UP IN BACK USB-HIGH FAN SPEED

system halted my pc help