Won't boot go on off on off - Sony VAIO Digital Studio PCV-RZ24G PC Desktop

If you want to keep your important data, use some softwares can solve thewindows won't startproblem most quickly, and no data will lose. Besides, it is very easy, even the people who lack of computer knowledge can deal with windows won't boot issue.

Try checking the CMOS battery

Windows won't start up? Well, try this Download Tenorshare Data Recovery from its offical site and install it. Burn it into CD/DVD, or USB flash, put into the computer you need to repair, Bios setting. It can make sure your important data will not lose. Best of luck
Related: windows won't start

The windows files are corrupted or the hard drive has issues, load cd installation disc if available, if that fails have the hardware checked for possible replacement.

consult the engineer

U need to be more specific or detailed with ur question

First you should check if there is any disk on your cd room, if there is any disk you should remove the disk from the cd room, if there is no disk the possibility is your hard drive getting error
Press f2 or delete to enter your bios set up system
Look for boot menu
Set the first boot as a HDD and the second boot as cd room and disable the third boot
Save and Exit the setting
if your computer still won't load you need to reinstall your windows
insert windows cd and go to set up again by pressing f2 or delete button
Set the first boot as cd room then the second boot as HDD
Save and exit the setting again
When the message press any key to boot from cd appears you should press the space bar or another key
Then just follow the instruction of formatting

Depends on what you mean by won't boot from DVD or Hard Drive,
it sounds like your boot order is what you're looking for help for.

To do this you need to get into your computers BIOS (or "Setup")
You can do this by rebooting the computer and the very very very first screen you see tells you how,
usually by pressing DEL or F2 or F10.

Without knowing the specific computer you're looking for help on I can only point you in the right direction however keep in mind the BIOS is for advanced users only and you can damage your computer by randomly changing settings.

What you're looking for though is usually called the Boot Order or Boot Sequence
You'll need to set whatever device you want to boot from higher on the list (usually with the up arrow or PgUp)
If you don't see your device on the boot list then it may not be detected due to failure.

CV boot, requires axle disassembly, or you could use an aftermarket, split boot. You MUST replace the lube....

It is often much better to exchange the shaft with a new or rebuilt one. Many vibrations are caused if there is even a minor imperfection in the CV joint.