How do you manuall turn it off?

Casio CDP has Auto Power Off: 30 minutes after last key operation, Auto Power Off can be disabled.
Please read the manual.

If it turns itself off while playing, I would try to buy a new AC Adapter to test. DC cable of AC adapters are often broken internally after much "bending".

make this test and fix it. God bless you

1. Interlock switch If your microwave is turning itself on, the first thing to check is the interlock switch. This is usually the first thing to malfunction that could cause this issue. If the interlock switch is bad then it will need to be replaced.
   
2. Main control board If your microwave is turning itself on and the interlock switch is still working, the probable cause is the main control board. If the control board is defective it will need to be replaced.
   

Usually all 3 of these things mentioned are activated when the key is turned to on. I don't know about any fuses or links on that bike but check your manual or online to locate them. The problem could be in the area of the start switch also.

incress water presher to

The error 51330 normally means that the password or WEP key you entered to connect to the internet through the Wii did not match the one the wireless router needs to allow connection.
If you don't know the password, check to bottom of your router, it will usually have a sticker on the bottom with the standard password on it. This can also be marked as WEP key or WPA key. Enter that password exactly as it appears there, as it is case sensitive. If the password is correct and the problem still exists, try turning your router off, waiting 30 seconds to a minute, then turning it back on. Let it set itself up again, this will usually take a minute or two, then try connecting your Wii to the internet again. If the problem continues, try altering your routers wireless channel setting. As most routers work on channel 6 by default, there could be interference. This process is different for each router.

It may be one of those calculators that always auto-powers down, based on an inactivity timeout.
Turn on the unit, and then don't touch it for 15 minutes - if it turns itself off, you have a very
non-green (power wasting), auto shutoff calculator.

That very very very small "manual" for the unit is available at
http://www.product-support-staples.com/PDFDocs/600515-instr_Page1.pdf

The same thing happened to me today. I was just sitting in my room then i hear a click and the cpu is on it stays on for a while then cuts off. It then cuts on and off with few seconds in between. It then stays in that way cutting and off for about a minite or two and then cuts off completely. A few minutes later it starts again. Also in the time it its off it will not turn on by pressing the power button. Sometimes it completly boots up by itself and then shuts itself down. If I shut it down manually while its on it'll turn itself on immeditaly after. What's going on! Will the warranty cover it? Do I need a new computer?

from original owners manual
check sleep timer or alarm time functions
electronic protection circuit may have been activated because of a power surge

I have Casio's and KonicaMinolta and they are programmed to turn off the screen if not used within 1-2 minutes. This is usually a kind of standby for the KonicaMinolta but for my Casio, it really turns off to save on battery. Did you read the manual on how to program the "Turn off after x no. of minutes" or something that sounds like that?

I've noticed that mine will power itself on as well. But is usually goes like this... 1. Sync with computer 2. Unplug cable 3. Turn off Axim 4. ~1min later...Axim is on and at the password screen