Dell e310 get black screen with cursor blinking after dell splash screen. F12 not responsive. front panel shows power green and number 123 are on. Thanks

See if you can boot to safe mode. Run check disk on the hard drive. Make sure the BIOS battery is ok.

you just need to re-install the Operating System from recovery cd

mother board is cra#.

There are lights on the back of the Dell that tell you a little more. Dell has an extensive list of trouble shooting procedures at http://support.dell.com/support/edocs/SYSTEMS/dim3100/en/sm/adtshoot.htm#wp1124478
Hope this information will help.
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Yes, this sounds like the traditional black screen issue, but it's different! This machine is a Dell Dimension 3000 with XP. System won't boot. After Blue Dell BIOS splash screen with F2 & F12 options, it just goes black. There will ultimately be a white cursor in the upper left hand corner. I can edit BIOS with F2, I can get in to the boot menu with F12, but I can't do anything after that. I can even get in to the Safe Mode menu (F8), but it never boots.

Try updating the system BIOS and video driver from support.dell.com

Try to restart your dell inspiron 1525 laptop.

try this:

Power the PC off, open the case cover, remove/reseat the video card in the slot.
* Power the PC off
* Disconnect the PC power cord from the rear of the PC
* Remove the computer cover
* Move the RTCRST (Clear CMOS) jumper from pins 1/2 and place it on pins 2/3
* Press the PC power button
* Move the jumper back to pins 1/2
* Remove/reseat the video card in the slot
* Replace the power cord and cover and then power the PC on

Hope it helps

Generally, the 1 and 2 Diagnostic LEDs indicate a failure of a PCI expansion card.
http://support.dell.com/support/edocs/systems/dim3100/en/sm/adtshoot.htm#wp1130520
So remove any expansion cards, see if anything changes. If it does, one of the PCI cards is suspect.
If the system has an expansion video card in the PCI-E slot, and removing the PCI cards had no effect, remove the PCI-E video card and connect to the intergrated video port (You may have to remove a black cover from the port) and see if you get video. If you do, then the Expansion video card has failed.

Try running diagnostics. Tap F12 repeatedly on the dell logo till you get the boot device menu. Choose diagnostics. Go through it.

If it doesnt even pull up the diagnostics, you can follow this walkthrough from dell's website.