Keep my disk tray from staying open after reboot

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Try tapping above the disk drive or if that doesn't work open the tray take your disc out close the tray. open the tray put ur disk back in and close the tray again.

http://www.dell.com/support/Manuals/us/en/19/Product/optiplex-gx270


HOPE THIS CAN HELP.

These WEB sites may help you fix this problem.
Computer In Start Reboot Loop
http://pcsupport.about.com/od/findbysymptom/ht/returns-to-advanced-boot-options.htm http://windows.microsoft.com/en-us/windows/help/printer-problems-in-windows

Press the black buttons on the sides of the computer located toward the back of the computer. The case will open on a hinge. The case can stick, so you may have to try it a few times.

For the Dell Optiplex GX270, you will utilize the Windows operating system default optical driver files.

Just physically connect your device and reboot your machine, the OS will pickup and automaticlly configure your device.

Just choose "Save and Exit" from BIOS setup, and your computer will reboot.

Do you mean a complete factory reset....if this is the case you must open the box, find the bios chip and beside it you should find its jumpers. The jumper must be taken off and stay off for at least a minute....replace as it was.....close the box and reboot, hey presto back to factory rest.

If the drive is seen in BIOS but not in Windows, then this should resolve:

http://support.microsoft.com/kb/314060

If the drive is not seen in BIOS, Reseat the power and data cables, and reboot and see if the drive is seen. If not, then boot to BIOS, turn on Caps Lock, Scroll Lock, and NUMLOCK, then press ALT+E (system should Beep once), Then Alt+F (Beep) then ALT+B to reboot Then gp back to BIOS and see if the drive is seen.

If drive still not detected, replace the drive

hmmm,
Dont worry just boot your computer using Bootable disk or windows installation disk, enter into Recovery console by pressing"R"
type the Administrator password if any or simply press "Enter".
At the command prompt type-"fixboot"
once done restart your computer normally.

use compatiable even though it takes longer the pc is not really made for xp this will force xp on it