Aspire z5700: No Backlight

[speedypro]

I got this i3 all in one computer desktop for repair.

It has no backlight. Changed inverter and same issue. If I removed any one of the four plugs on the inverter, the backlight comes on at startup but just for few seconds. These plugs are for the lamp (backlight).

Board issue anyone?

Board model: DAOEL5MB6E0. Also I may have post this in the wrong section.

[dj_ricoh]

Re: Aspire z5700: No Backlight

speedypro i3 with normal lcd screen like inverter?

if yes try a smash screen like just connect it to the inverter and let the original with video cable on

[speedypro]

Re: Aspire z5700: No Backlight

I'll try that. Thanks.

[robrock1]

Re: Aspire z5700: No Backlight

check if brightness and power on signal is stable (3.3v or similiar) at the inverter, if its ok, resolder inverter coil and transistors. connect known good lamps and try. reduce the brightness.

[speedypro]

Re: Aspire z5700: No Backlight

check if brightness and power on signal is stable (3.3v or similiar) at the inverter, if its ok, resolder inverter coil and transistors. connect known good lamps and try. reduce the brightness.

Nothing to do with inverter as we've tried another one. This other inverter was bought off ebay, so how knows if its working lol

[dj_ricoh]

Re: Aspire z5700: No Backlight

Nothing to do with inverter as we've tried another one. This other inverter was bought off ebay, so how knows if its working lol

just try a smash screen and see if it lights up.
i made today like 3 ; same thing.
if there is no backlight on lcd with lamp i`ll fix it.
i got 30kg of smash screens

[speedypro]

Re: Aspire z5700: No Backlight

I have yet to try one as yet. But if I remove one of the lamp connection off the inverter, it lights up for few seconds then gone. The inverter has four lamp connectors. When all four are connected, no light.

[dj_ricoh]

Re: Aspire z5700: No Backlight

I have yet to try one as yet. But if I remove one of the lamp connection off the inverter, it lights up for few seconds then gone. The inverter has four lamp connectors. When all four are connected, no light.

i just saw the pics on google.
you need to be on lcd monitor section.
try to find some spare lamps from broken screen like salvage and test like here:
http://www.youtube.com/watch?v=eORAoaWpqao
see if you got a lamp on your screen that has fail.
top or bottom

[spidey]

Re: Aspire z5700: No Backlight

you have a bad solder connection to ccfl or one of the lamp is bad. Unassamble the screen and check the lamps.