Dell e152fpb no back light

[PlainBill]

Originally Posted by Maluko75

ah ok..

Hold your horses!!! There is no need to replace anything AT THIS TIME. That may change within a few minutes. I'm going to redo the picture based on Bobdee's correction.

OK, corrected picture is attached. Here is what you should do: Set the meter to the Diode check scale - often one of the lowest Ohms scales (this applies about 2 volts across the leads). Note that each of the transistors circled in red has the letters B C E near it. Probe the pins with the leads in both directions. I suggest doing this as follows: Hold the black probe on the leg labeled B. Note the readings when the red probe is touched to C and then E. Move the black probe to C and note the readings when the red probe is touched to B and then E. Lastly, move the black probe to E and note the readings for B and then C. Repeat for the other three transistors.

A good transistor out of circuit would show open on all readings except when the red probe is on the B (base) and the black lead is on either the E (emitter) or C (collector) for the 2SC5707 and any other NPN transistor. Then it should read about .7 volts

This may not be the case with the transistor in circuit, but you should get similar readings for all four transistors. Under no circumstances should you get a reading of 0 volts.

PlainBill

[Maluko75]

Well the one under the heat sink should it read cont?

[Maluko75]

YOUR THE MAN......i took out the 2amp pico fuse and tested it out the board and got no contso, iwent aheah and swapped in another and Bam A Magician was Born.. it lit up the screen.But lets see for how long,i'll keep you posted....

[PlainBill]

Originally Posted by Maluko75

YOUR THE MAN......i took out the 2amp pico fuse and tested it out the board and got no contso, iwent aheah and swapped in another and Bam A Magician was Born.. it lit up the screen.But lets see for how long,i'll keep you posted....

Bobdee deserves credit for identifying the location of the fuse!!!! As thanks you should attach a picture of the working monitor.

It would be an excellent idea to turn off the monitor, remove the power supply / inverter, and thoroughly resolder all the pins on the inverter transformers. Bad solder joints on these are a known cause of problems.

PlainBill

[Maluko75]

Well a big Presto thanks to Mr Dee and Mr Bill...and i'll send a fresh pic as soon as i get my freakin camera back,,,lol

[Maluko75]

Here you guys go, and another round of thanks..............
Ya'll be saved in my favorites...

[abdo]

bonsoir
je suis nouveau ici, j'ai le mème moniteur dell e152fpb , il a le problème eclairage je l'allume le voyant est vert,l'ecran noir quand j'eclaire l'ecran avec une lampe je vois l'affichage qui est normal,j ai besoin du votre aide pour reparer ce moniteur merci

[PlainBill]

Bienvenue.

Il serait mieux si vous postez votre problème dans ce fil. En outre, alors que le français est la langue de l'amour, beaucoup d'entre nous sont limitées à l'anglais.

PlainBill

[abdo]

ok thank you