As you are in Leeds, then go to Farnells !! Obviously no postage as it would be an over the Counter purchase, and I don't think there is a minimum order when you collect.
As you are in Leeds, then go to Farnells !! Obviously no postage as it would be an over the Counter purchase, and I don't think there is a minimum order when you collect.
Hi mate,
got 2 x 1MOhm and fittedm but no joy still dies after a few secs.
This is with a NEW screen asthe old one had a broken CCL. I know its the PTB-1511 board as I have a couple of these and substituted for a good one. Any ideas what else could have died?
Have just checked the faulty board I have,and that has the same symptoms as your has,BUT the fault is an open secondary on the Inverter Transformer T101,and am still waiting to find one,they should read approx 450 ohms.Also my R125 and the similar one on the other transformer is 2.2Mohms.
Have just checked the faulty board I have,and that has the same symptoms as your has,BUT the fault is an open secondary on the Inverter Transformer T101,and am still waiting to find one,they should read approx 450 ohms.Also my R125 and the similar one on the other transformer is 2.2Mohms.
Thinking of buying a replacement PCB from EBAY:
Item number: 140512299224
If and when I do you can gladly have my faulty board for parts...
I know this is an old discussion, but it is the best I have found; and hope some of you might be able to help.
I am wondering if anyone has resolved this issue. I too have one of these Dell monitors that displays a screen for less than a second before going blank. I too have noticed a burnt R125 resistor (but still seems intact). I was thinking of replacing the inverter board but am reluctant to, if it is just going to fail again.
I suspect from reading other forums that one of the lights may be gone and that the board automatically shuts down all others once it senses this....perhaps this is why the R125 resistor is overheating.
hi Rtech, sorry for the late reply but couldnt get back to this project until now. Resistances of the secondaries are fine. A = 459 , B=434. all cap's look ok, no signs of any problems......will check them with DMM when I get a different one that can check farads. (I think I have one in work somewhere).
By the way, I can see the screen when I shine a flashlight on to it.
hi Rtech, sorry for the late reply but couldnt get back to this project until now. Resistances of the secondaries are fine. A = 459 , B=434. all cap's look ok, no signs of any problems......will check them with DMM when I get a different one that can check farads. (I think I have one in work somewhere).
By the way, I can see the screen when I shine a flashlight on to it.
If you can see the image,,then definitely a Backlight issue.
Things happen slowly in my country....anyway, I finally fixed the monitor and am looking at it right now. In the end, I purchased a new inverter board on ebay for 20 bucks. I couldn't locate any bad caps (but are sure there were some) I took a chance that the lights were ok and went ahead with the purchase. I will post again if there is any problem with it. So far so good, but it has only been switched on for 1 hour.
Thanks for all the help everyone.
Comment