Hi, and I hope i'm putting this in the right part of the site, please shuffle it around if i've made a mistake 
An EMPREX TFT screen came to me for repair, so I'm hoping this info will help somebody, it was a straight forward fix, but may help somebody with several models of the same design.
The screen was doing the usual thing, of switching on for a few seconds, then off again. The display never lit up at all, though the power light came on green for the 2 seconds, then back to yellow for Stand-By mode
On most of the screens I get to fix, I start by replacing the screens flat data cable with a known testing one I have. But on this screen, that didn't help, so I examined the circuit instead.
A group of 4 caps grabbed my attention. I've shown them in a photo attached here, I hope it makes it clear. Another photo shows the 4 caps once removed. There's very little sign on a problem, except one shows a leak at the top vent. Even close up, none actually show a break in the vent as its that slight, but all 4 are bulging just a little.
I replaced all 4 as they only cost about 80p each, and it's completely fixed the display. Here is the details on the replaced components:
Original Caps:-
2 larger caps are 680uf 25volt 105 degrees C, made my Su'scon and labelled
with 0805(M) on them.
2 smaller caps are 1000uf 10volt 105 degrees C, made by Su'scon and labelled 0803(M).
The replacement ones are:-
Low ESR type, 680uf 25v KZH with no manufacturer name on, and labelled with (M) 105c 0(7) 3Z
Low Impedance type, 1000uf 10v -4-+105c and a name lable written in gold on black that I can't read
It looks like a fancy company logo.
I hope that info is of use to somebody out there
In the photos i've included, it shows both the power board and logic board of the screen I fixed, there are many variations though generally it's just things being shuffled around the boards. Other photos are a close-up of the caps that I replaced, a photo of the 4 old ones I removed (showing slight bulging and a leak on one).
An EMPREX TFT screen came to me for repair, so I'm hoping this info will help somebody, it was a straight forward fix, but may help somebody with several models of the same design.
The screen was doing the usual thing, of switching on for a few seconds, then off again. The display never lit up at all, though the power light came on green for the 2 seconds, then back to yellow for Stand-By mode
On most of the screens I get to fix, I start by replacing the screens flat data cable with a known testing one I have. But on this screen, that didn't help, so I examined the circuit instead.
A group of 4 caps grabbed my attention. I've shown them in a photo attached here, I hope it makes it clear. Another photo shows the 4 caps once removed. There's very little sign on a problem, except one shows a leak at the top vent. Even close up, none actually show a break in the vent as its that slight, but all 4 are bulging just a little.
I replaced all 4 as they only cost about 80p each, and it's completely fixed the display. Here is the details on the replaced components:
Original Caps:-
2 larger caps are 680uf 25volt 105 degrees C, made my Su'scon and labelled
with 0805(M) on them.
2 smaller caps are 1000uf 10volt 105 degrees C, made by Su'scon and labelled 0803(M).
The replacement ones are:-
Low ESR type, 680uf 25v KZH with no manufacturer name on, and labelled with (M) 105c 0(7) 3Z
Low Impedance type, 1000uf 10v -4-+105c and a name lable written in gold on black that I can't read
It looks like a fancy company logo.I hope that info is of use to somebody out there
In the photos i've included, it shows both the power board and logic board of the screen I fixed, there are many variations though generally it's just things being shuffled around the boards. Other photos are a close-up of the caps that I replaced, a photo of the 4 old ones I removed (showing slight bulging and a leak on one).
Attached Files
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