Dell 24" LCD, bad inverter or light - testing?

[Elmojo]

Re: Dell 24" LCD, bad inverter or light - testing?

...with the delay I've lost the details of this thread. Skimming it, I often asked myself 'Why did I ask that?' Now I'm wondering if I was smarter then.

Then? It's only been about a month! lol
C'mon Bill, you aren't going senile on me, are ya?
Seriously, though, thanks for the help. I'll be glad to recap (no pun intended) any details that may have slipped your mind since we talked last.
I'll try to get some time this evening to test out the pins and report back.
What voltage should I be looking for on pin 3?
5v like pin 5 or something else?

Thanks again,
Mike

[PlainBill]

Re: Dell 24" LCD, bad inverter or light - testing?

Then? It's only been about a month! lol
C'mon Bill, you aren't going senile on me, are ya?
Seriously, though, thanks for the help. I'll be glad to recap (no pun intended) any details that may have slipped your mind since we talked last.
I'll try to get some time this evening to test out the pins and report back.
What voltage should I be looking for on pin 3?
5v like pin 5 or something else?

Thanks again,
Mike

Yes, I am. Sometimes in the middle of a sentence I forget what

I don't have the schematic for this inverter, but one is power, the other is Enable. Both should be above 3 volts, Vcc (pin 5) should be at 5V.

PlainBill

[Elmojo]

Re: Dell 24" LCD, bad inverter or light - testing?

Hahaha good one!
I'll check the voltages asap, probably tomorrow afternoon when I get home.
Do I need to plug everything back into the board or just certain things?
I assume I need to plug in the cable that connects to the front panel switches, but what about the HV cables to the lamps, do those need to be connected also?
Thanks,
Mike

[Elmojo]

Re: Dell 24" LCD, bad inverter or light - testing?

Okay, finally got home long enough to test it out.
Pin 3 reads 4.82v
Pin 5 reads 4.89v
Oh, and the backlight is lit.....wait, what?
It appears that the problem was just a sketchy connection of the inverter wires to the lamps.
Huh, go figure!
Well, I guess it's fixed for now.
Thanks for the help Bill.
I'll be sure to post back if anything else pops up.
-Mike

[JonathanAnon]

Re: Dell 24" LCD, bad inverter or light - testing?

Hi guys, had the same CCFL chip and couldnt find the pin outs, this thread again was very helpful...