Unfortunately, with that many "similar" devices running at the same time, conflicts are bound to occur...First, by "Fails to boot up", what exactly occurs? Is there an error message or does the comp simply stay at a black screen? Recognize the more USB devices, the slower the boot will be..How long have you waited?
Note the article below at the link:
You Cannot Simultaneously Use Multiple USB Scanners in Windows XP
Next, are you using Service Pack 2 on the XP Media Center Edition..If not, you probably should..Lots' of fixes in SP2..
Have you checked for a BIOS update for that computer? See the computer manufacturer's website..
Have you installed all the most recent firmware or drivers for all the external drives?
Since you stated the hard drives would be used as backups, I'm curious why you would want to run them all at the same time?
Hope this helps.
I have a Dell Dimension 8400 PC - Windows XP Media Center Edition; pentium 4 cpu 3.2; 1 G memory. We have many music/video/digital image files and have purchased 3 external hard drives for storage and back-up purposes connected via USB(2 Western Digital 80GB each; and 1 Seagate 160 GB). We have 1 HP printer, 1 Visioneer scanner, and a kodak digital scanner connected via USB ports. With the addition of the most recent Seagate external drive the PC fails to boot up when the externals are turned on. I bought a USB hub to try and rectify the problem but no help. Obvious solution is to wait to turn the external Seagate on after the PC boots up but given the computers CPU and physical memory shouldn't it be able to boot up right away with the devices connected and powered on???? please help thanks Sean