Something very weird.....(need lot-o-help)

Motoman · Post by **Motoman** » Fri Jul 22, 2005 1:08 pm

I powere my psone screen today (with the wall adapter) and there is no light coming to the tube. I dont know if the screen works because i have nothing hooked up to it. The weird thing tho, is that the power thing at the top of the screen makes a wierd sound. (like a dentist drill) and then the occasional static sound. It also smells like its burning a bit. I know that the tube is getting power because the lightbox is warm, also the 7805's work sooooo...... Is it just because my tube is burned out or is my screen seriously retarted?

daguuy · Post by **daguuy** » Fri Jul 22, 2005 1:15 pm

so the tube doesn't light up and the thing at the top is making a wierd noise. the thing at the top is the transformer that powers the light so it either broke or is malfunctioning to give the tube too much voltage so it burnt out. did you try testing it when it's open and find out where the burning smell is coming from? maybe you could do the LED mod to replace the tube and transformer. another thing that might have happened is a fuse blew and you could jump it, i don't know how to tell the difference between bad fuses and good fuses but see if there's a fuse for the backlight.

Motoman wrote:I dont know if the screen works because i have nothing hooked up to it

a way to test it without a video source is press the volume/brightness buttons and see if you can see the gauge

Motoman · Post by **Motoman** » Fri Jul 22, 2005 2:20 pm

I left it plugged in for about 40 min i think i found the culprit fuse.. Its a black one,DP1. I'm going to jump it and see if that works. Holy crap that thing had some pretty excesive burn marks

I dont get what you mean to guage it without video/audio?

daguuy · Post by **daguuy** » Fri Jul 22, 2005 2:31 pm

Motoman wrote: I dont get what you mean to guage it without video/audio?

the green bar that apears if you press the bright/volume buttons

Motoman · Post by **Motoman** » Fri Jul 22, 2005 2:37 pm

Ahh crap... Its over for my PSone screen. I tried jumping the fuse and the dam thing copulate "crumbled". Arrrggg

!@$# $50 bucks gone

daguuy · Post by **daguuy** » Fri Jul 22, 2005 2:40 pm

the fuse crumbled? it's already blown so it doesn't matter

Motoman · Post by **Motoman** » Fri Jul 22, 2005 2:51 pm

But can it still live without the fuse or is it screwed?

daguuy · Post by **daguuy** » Fri Jul 22, 2005 2:56 pm

find out. if the fuse has blown already, you don't really need it anymore, that's why you jump it

G-force · Post by **G-force** » Fri Jul 22, 2005 3:00 pm

It dosnt matter, just remove the fuse and put a wire there. A fuse is just protection against spikes, so as long as you use a battery that is within 7.2V-9V you'll be safe.

nos_slived · Post by **nos_slived** » Fri Jul 22, 2005 3:45 pm

daguuy wrote:i don't know how to tell the difference between bad fuses and good fuses

The continuality setting on a multimeter. It should show either "OPEN", "CLOSED", or "SHORT". Sometimes those are abbreviated, but you can tell what it is. "CLOSED" sometimes shows as a "0" or blank screen, but it means that the no current is flowing between the contacts. "OPEN" and "SHORT" both mean that there is a current flowing from one contact to the other. Just put the contacts on opposite solder points(when the power is off), and wwatch your multimeter.