Piva 15" LCD/DVD/VGA runs while power button depressed

[jmfox]

I had it apart a while back and have images, but they are not very clear in details.

This is an "Anti-Shock" portable device and I ran it in a vehicle with the provided DC power cord as both a TV/DVD player and secondary display for my laptop. It's is really nice and convenient, so I would like to repair it if possible.

I found nothing obvious when I had it apart and inspected it. Except a ugly looking solder joint on the bezel control board (corrected). Also swapping power supplies (external like many laptops) had no effect.

Does anyone have any ideas on where to start? I have a couple cheap DMMs and follow directions quite well

I'll pull it apart again and carefully recheck and inventory the caps... just to double check.


Jim

[Krankshaft]

Re: Piva 15" LCD/DVD/VGA runs while power button depressed

If it runs when you press the power button shine a bright flashlight on the LCD.

If you see a faint image check the inverter. The tiny PCB all the way to the right with the purple (probably Hermei) cap on it.

[jmfox]

Re: Piva 15" LCD/DVD/VGA runs while power button depressed

Thanks for the quick reply.

The back light works fine. What I mean by runs is that it starts up and if in DVD mode will boot to the menu of the DVD in the drive and then not respond to the remote. So unless the DVD auto plays, say after a delay it will not continue, as it will not respond to the remote while the power button is depressed. As soon as I release the power button on the bezel it powers down, I can almost select an option on a DVD first but it will power down.

Same thing in any other mode.

Tuner mode - starts, displays whatever channel it is on, and will not respond to the remote. Powers down when the button is released.

VGA Mode - Same, which is almost OK but eventually you need both hands for something

It will start from a power up command on the remote, but then depending (it seems) on how hot or cool the device is, may either reach a DVD menu or just start booting the DVD before it will recycle and retry. It will recycle the power state like this endlessly. The only thing that seems to happen is the cycle gets shorter the hotter it gets. Note: I never let this go on longer than about 4 -5 minutes.

I suppose I can open it up and put the boards in a the freezer to see if they then start and run. Then when it starts again do one board at a time.

Jim

[Krankshaft]

Re: Piva 15" LCD/DVD/VGA runs while power button depressed

Check all of the boards over for cracked solder joints.