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Re: power button doesn't work...
Your problem is not the switch. Probably you have faulty capacitors, deteriorated solder joints or worn out bulbs.
To open the case, remove the base (push button and lift off).
remove any screws under the base plate.
Pry the front and back cover apart, they snap together.
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I just purchased a 2007 VIP Vantage with an LST 3800 and it was experiencing similar problems. I noticed that the "UP" button didn't feel right when pushed, so I pulled it out of the dash and used a very small screwdriver to gently pry off the front bezel. There's a clip on each side that holds it in place, and it's fairly easy to remove. The rubber button pad had a tiny piece of plastic (it was the same material and color as the plastic in the bezel) between the bezel and the button pad that was causing the "UP" button to depress constantly. I put the button pad back into the bezel, snapped it back on and the depth sounder is working fine. Best of luck.
Most newer PC Towers have a front panel that can be removed exposing the push button mechanism. Check to see if yours does. If so remove the the front panel/bezel. You will see the mechanism that actually pushes the on and off button post. Check the spring mechanism to see if it may be broke or just out of alignment. If you are unable to remove the front cover/bezel then the switching mechanism is inside the tower and should be taken to a repir shop for repair or replacement.
I know, this is a very frustrating situation... Unfortunately, the only reasonable way to find out what's wrong is to swap components with a reference system, until you found the defective part. I hope you have another P3 system available to swap parts.
I would do it this way:
First check that the power button is connected correctly.
Swap the memory from the faulty system to the reference system.
If ok, put it back into the faulty system and connect the power
supply from the reference system (or some other known good one) to the
If this doensn't help, swap the CPU from the faulty system to the reference system.
If the CPU is ok, the motherboard seems to be defective.
Hello, You might check the fuse - it is located in the end of the charger cable. The round end that plugs into your lighter unscrews and you will find a fuse in there. Also try plugging it into a USB port on your computer while it is running to see if that USB cable will charge it. If that does not work I would call tech support for the Unit and see if you can get it fixed or repaired under warranty. Good Luck - Dr. Know
Either the new power supply you purchased is not functioning correctly. But, assuming it is now that you are getting some form of power to your PC, it is very likely the motherboard. Whatever fried your old power supply (or it could have just been the power supply itself) most likely fried your motherboard in the process. Probably not the CPU since the MB can't even post.