Dull Belinea 1925 S1W

[GarethJ]

Hi all,
I have the above monitor which had given good service until it suddenly went very dull.
The backlight seems to be working and the OSD is nice and bright, but the rest of the picture is very dull.
Brightness and contrast are wound up to max.
Don't know if this is relevant but it will only work when colour temp is set on "Custom Colour" with RGB all set to 100%. If I select a preset colour temp (9300K or 6500K) the display goes blank.
I have opened the unit and had a quick look at the boards but didn't spot anything obvious.
Can anyone help?
Thanks,
Gareth

[budm]

Re: Dull Belinea 1925 S1W

Do you get the same problem when use this monitor with another PC?
" If I select a preset colour temp (9300K or 6500K) the display goes blank." This may point the problem to the main board.

[GarethJ]

Re: Dull Belinea 1925 S1W

I've tried several PCs with the same result.
I suspect the main board as the OSD menu window is as bright as ever.
Is there any chance of an economical repair?

[GarethJ]

Re: Dull Belinea 1925 S1W

Update-

I had a better look at the boards and I've noticed swollen caps on the main board.
The one at the top (next to screen connector) and two of the group of four to the lower right.
All are "CapXon" 330microfarad 16v.
They look like they may be leaking.

Is this likely to be the fault and will replacing them cure it?

Appologies for the images. Bad light, no tripod and shakey hands.

Gareth

[selldoor]

Re: Dull Belinea 1925 S1W

Bottom line is probably we dont know. The faulty caps may have damaged another
component - voltage regulator for example.

[GarethJ]

Re: Dull Belinea 1925 S1W

I'll try replacing them.
I'm a relative novice to the theory side but the practical work will be no problem.

Do these look like suitable replacements?

http://www.ebay.co.uk/itm/330uf-16v-...item336ead3353

If the link doesn't work, it's item number 220900176723

Should I replace all the 330uF caps or just the obviously sick ones?

[selldoor]

Re: Dull Belinea 1925 S1W

We usually warn against buying caps on ebay lot of fakes about. he does have 100% If they really are panasonic fc then they will just about do - at least they are going to be better than the old ones. I dont understand why he puts up a pic of doubilier caps - they are usually poor sold at maplins ok for some projects but not this.
I would replace them all if same voltge and uf - it a pack of 10 anyway - use them up.

[GarethJ]

Re: Dull Belinea 1925 S1W

I'll buy them, swap them (all that are same uF and V) and post again if I get anywhere.
Thanks for the help.
To be continued. .......

[kc8adu]

Re: Dull Belinea 1925 S1W

look for a master reset/service menu after the caps are replaced.eeprom is corrupted.