Dell E171FP sync issue?

[cadillacman]

Hi fellas and ladies. I have another weird one here.

I picked up this dell e171fp monitor.

It powers on, backlights stay on, power stays on, i can kind of see an image but its all hashy and looks like the monitor has lost horizontal sync.

ANyone ever ran into this? Im guessing mainboard issue?

[retiredcaps]

Re: Dell E171FP sync issue?

Reseat and clean every internal connector.

If that doesn't work, try checking the voltage regulators on the main board and panel board (or t-con).

[cadillacman]

Re: Dell E171FP sync issue?

unfortunately no luck on the reseat job.

The longer its on the hashier and slower the screen response gets. ALso will not turn itself off. Yay. Guess i need to make sure my power suppply works and then track down a good mainboard if the ps checks ok?

[cadillacman]

Re: Dell E171FP sync issue?

Ha.. got home tonight and my kid had this monitor out and plugged in playing with it.

Much to my suprise, its working now. I dont know if he accientally figured out some sort of reset, or if it only works because its warmed up.. i guess i will make this my pc monitor for awhile and see if it starts acting up again.

[cadillacman]

Re: Dell E171FP sync issue?

Ok.. what happened is when i got home the monitor was plugged in backlights on, no Picture. Monitor was warm from being on several hours. After a power cycle now the monitor came up fine. Used for a couple hours working fine., Powered on and off several times, still looked good. I unplugged it and let it cool off, now its acting up again. I have got to have a bad solder joint somewhere on the mainboard. Hopefully i will be able to figure out where and fix it with my hakko hot air rework station.


Hmm.. could be weak caps too on the second or third powerup it will usually come on right, each time looking better and better on screen untill finally it powers on clean and sharp. sometimes will power cycle itself and then stay on... this ones an odd one. MAybe i ought to just cap it first and see what i get from there. No ammount of flexing anywhere will make the issue come and go.

[budm]

Re: Dell E171FP sync issue?

When caps warm up, ESR will go down. Get yourself a can of Air-duster, use it upside down to get freezing air for cooling to locate which board is bad and Hair dryer for warming up the boards. More likely to have bad caps.