When i reboted my pc i simply wont come back on. The lights are on the fan is working the cd drive can be opend and closed. The monitor is ok. When i turn it on theirs no beep it just wont power up

Beginner guide to Android How to setup your phone or tablet

How to Reset Samsung Galaxy Tab to Factory Settings Galaxy Tab Forum FAQ...

When you long-press the power button on Android, this usually causes a forced shutdown.

A hard reset is when you reset your tablet to a state where there is nothing on the tablet except for the default apps and the operating system.

Try this unscrew the cable from the back rub your finger over the center and the side of the cable.Unplug the modem for 20 seconds plug the modem back in and immediately put the cable back in.
I can explain how this works but would take to long.

First open your cpu box and clean your ram and also where ram is put. Then rebot your system again it will work. When it will not work please change your ram.

Fan spinning hard is usually a CPU issue.
If you've made any hardware changes to your computer, undo them. This happened to me when I was trying to upgrade my Processor (CPU) and I had the wrong kind.

You may have to go into the bios and re set the boot order to CD first.
When you first turn on a computer you need to go to setup- usually by hitting delete or f10. Look for anything that says boot drive priority and move cd-rom to the top of the list. Save and exit and this may solve your problem.
Also, if this new drive has malfunctioned in any way the computer will stop trying to boot from it.

Probably can't find the hard disk drive or you have a non-bootable disk in whatever is defined as the fiorst boot device

First reset it to turn it off then do this: First, back up all of your music and do this: Turn off the player and disconnect it from the computer. Then press and hold the play/puse button and turn it on simultaneously. The player should be in recovery mode. Scroll down and select format (all) and let it format. Then reload all of music back onto your player and it should work like new. Hope this helps!

well for the cd not ejecting theres only a couple manual ways to eject it. these can be found at http://support.xbox.com/support/en/us/nxe/kb.aspx?ID=906935&lcid=1033&category=hardware

Check the boot order in the Bios
Must be:

HDD-0
CDROM
etc

If the RAM is fine, but it's turning itself off after 10 seconds or so, then it's highly likely the motherboard needs replaced. What I would suggest, if you are comfortable doing it however, is to check the fan isn't simply clogged up (this will determine whether it is a problem with the motherboard itself, or simply a problem with the fan overheating, and the motherboard turning off as a fail-safe). Bear in mind, this will require stripping the laptop down, and should only be done if you can put it back together properly.