Cannot boot from usb. dell serverPoweredge 2650

This usually is cause when the computer cannot find the boot program on you HDD. But there are other causes also. Before going to the boot program let's check other things first. Your primary boot sequence in the CMOS setup is not set to you primary HDD and the computer looks for the boot system in the CD/DVD/Blueray disk drive or USB and couldn't find any boot program. But normally it would skip those and go to your primary HDD. But if you have those CD/DVD or a USB stick, external HDD plugged in then remove them and try rebooting again. If that doesn't work, than you have a defective HDD. Check your HDD, try recovering with windows recovery disk. Worst thing, Reinstall windows again, install new HDD and reinstall windows.
Sorry for the later suggestions.
Good luck

have you went onto the BIOS to make sure that the boot options are correct e.g. CD DRIVE 1st priority?

Hi Dell poweredge 2650 dosent support usb boot
try using a CD or DVD or floppy if you can get 1 big enuf

Unfortunately, the 2650 cannot boot to USB devices. Try PXE if installing an OS.

run system diagnosis with dell cd. it will start when u boot ur dell 2650 with driver & diagnosis cd

Simplest solution is a PCMCIA or a USB Modem
http://www.newegg.com/Product/Product.aspx?Item=N82E16825164005

Boot to the Windows XP CD, reformat the existing NTFS partition and install to that partition. After installing XP, install the drivers
http://support.dell.com/support/downloads/driverslist.aspx?c=us&cs=04&l=en&s=bsd&ServiceTag=&SystemID=INS_PNT_P4N_2650&os=WW1&osl=en&catid=&impid=
There is a link at the top, that indicates the driver install order and you can download the drivers and put them on a USB Key or a CD-R before installing XP

try turning usb support on in the bios,if this doesnt work try reseting your bios this should return it to default,hit f2 as it restarts when you are in. hit alt e alt f it should beep everytime you do this,what this basically does is clears nvram, go to boot devices and see what you have available,exit and retry your boot device

pulling the battery will not help it is hard coded in CMOS you need to send it in or take it to a service center that can re flash it for you i do not suggest you re flash BIOS on your own because that could cause a bigger problem

The keyboard is probably broken or the cable is loose (unlikely) from the motherboard. Does the keyboard work at all? at any point?

Try a external keyboard, usb for example and see if that works.