ricemakr = Your problem seems to happen at boot. You need to start your own thread as your Blue screen is most likely different.

Blood_Guardian = I have been seeing this a lot at my bench. They...

To add onto what firekid said. Check and reseat all cable connections as any of them could come loose during the move. Also what brand is the computer. This sounds like the problem a lot of...

Kraai = PSU = Power Supply Unit

Does the same thing happen if you put your old proc in the system. Since the problem started after the upgrade i would try undoing the upgrade to eliminate that as...

It could be memory like the previous poster suggested or a failing Hard Drive. I would do a back up immediately just in case if you haven't already. Download these utilities to test the system.
...

Just because you have only had the board for 3 years doesn't mean that battery isn't bad. 5-8 years is what they are rated for but batteries go bad. Try replacing the battery. You might be...

The most common reasons your computer will randomly restart is hardware failure or blue screen errors. The more immediate problem is obviously your power issue. Normally i would suggest flushing...

When you first turn on the computer and get the start up screen of safe mode, safe mode w/networking and such. Choose the option for disable automatic restart on failure. This will leave the Blue...

Online or through some retailers. Depends on where you live.

MCM Electronics - Online Seller (http://mcmelectronics.com/search.aspx?C=&K=freeze%20spray)

This is documentation from hp service alert publish on their ASP site. Have you tried these steps. after removing all power(ac adapter and battery) hold the power button down for 20 seconds. Then...

Use another computer and download the correct bios. Flash the bios with the correct version.

What program were you running?

What make and model of laptop you have?

Do you get a display if you hook up to an external monitor?

Try going into the bios and setting the HDD as the first boot device.

You could also pick up some freeze spray. You spray it on the board while it is running and will tell you if there are bad traces.

Can you please go into a little more detail. Does the system start to load windows(see the windows loading bar) Where does the system hand loading safe mode?
Trying to boot from cd, did you change...

Try booting the system with just core component to get the system to post. Use only the following
motherboard and proc are obvious
1 memory module
graphics card only if no onboard

Do not...

I am inclined to agree with caperjack here. When the system "goes to sleep" is the power light still on or off, or does the system restart and show the bios splash screen again, or is it the monitor...

I was just looking this over again and after rereading your post got me thinking. You say it just turns off before loading windows. Could you elaborate on this a little.
-Does the unit completely...

When you say the computer locked up right away, your saying it locked up and all the words are left on the screen and does nothing. Is this correct?

If so i would suspect you hard drive may be...

Can you please clarify.

Is your computer going directly to sleep mode after windows loads. I have never heard of this before.

How long does your computer take to boot up?

Do you have access to another external monitor that you can connect to the VGA port on the computer.

You might also try removing the battery and the ac adapter so no power is connected to the...

I assume you are referring to the BIOS splash screen when you first turn on your laptop.
Can you access the bios by hitting the F2 key. Maybe a different key for your computer as it is different...

You are more than likely correct there. Usually with your symptoms and the fix i suggested doesn't work the internal power supply on the notebook is bad.

The cost on this repair varies. If...

What is the model number of your gateway.

You might try going into the bios. You can access the bios menu by hitting the F2 or F10 key at the gateway logo when you first turn on. The key you...

When you plug in the ac adapter does the unit show that it is plugged in on the LED?

Was the unit turned on and running on battery when you last used it, IE: was the unit in hibernation mode?
...

The dimension 8300 does have a bad design. There are no clamps on the processor. The proc is held in place by the heatsink.

You have to reapply thermal grease after removing the proc. ...

Sounds like you have a bad DC jack on the notebook. You will need to have the jack replaced

Go to : http://support.toshiba.com and choose downloads from the tech support center area. The choose portables, satelite pro, and your exact model number. There are 2 models of A200. Choose...

You don't have to get a new power supply to test if it is bad. You can test you PSU with a voltage meter to see if there is a problem.

The following if from the following URL:...

What brand of computer are you using and what OS? There has been some issues with new dells with this same BSOD.

I believe the file is the sata driver for the HDD. How are your drives...

You have to do more than just pull the battery out. After removing the battery, hold the power button down for about 20 seconds. Make sure the AC is unplugged as well. There should be no power...

There are some known issues with some of the pavilion notebooks. this is a service alert from hp regarding them mentioned model of notebook here

Notebook May Not Boot After BIOS Update
HP Compaq...