I have a 3 C cell Mag Lite LED, comes on normal but after a few seconds it flickers and goes out.

That is normal for a mag light.

SOUNDS LIKE IT IS CORRODED. PUT A FEW DROPS OF RAPID TAP TAPPING FLUID OR A FEW DROPS OF THIN MACHINE OIL AROUND THE CAP. LET IT SIT FOR A FEW DAYS AND TRY IT AGAIN.

take the bottom piece off, remove the last battery and put a coating of petroleum jelly on the threads of the tube. Then take the bottom piece and run it all the way in and back off and back in 2 or 3 times. Then put a little more petroleum jelly on the threads and put the battery back in and the bottom piece. This should do it.

http://www.takeitapart.net/archives/mag-lite-2d/

Hello,

The picture board on your monitor is bad, since it goes off after few seconds and the power led or button is on, it means the picture board of your monitor has developed fault.

The best thing for you to do now is to take the monitor to a local repairer or service center within your vicinity to help with the replacement of the picture board because the fault is not something you can fix yourself, in order not to complicate issues.

Take care.

It sounds like a faulty battery. As it is under 1 year old, it is still under warranty. Return it to the origional place of purcase, who will either fix or replace it.

you should send it to get fixed

Hi ,
The monitor flicker problem. The monitor when turn on will display image for couple of second then turn black. The monitor status led is still green. This will happen each time it is turn on. The symptom at appear to come from the inverter board.

Sounds like an inverter problem. If the power supply is internal replace the capacitors coming out of the voltage regulators. These are usually 1000mf and/or 470mf. If that doesn't do the trick look up the numbers on the 8-pin chips that drive the secondary transformers on the inverter to see if they are getting the right voltages.
Good Luck!