Faulty LCD monitor advice needed. Screen goes white after 15/20 seconds

[oddsey]

Hi
I bought a LCD monitor off eBay (fault was described, only cost me 12
quid inc delivery!) hoping to do a cheap fix!
When turned on all is fine for 15-20 sec then the screen fades to
complete white. Sound still comes through its speakers and if ya switch
off, then on again you get a perfect picture for about 10sec, before it
does the same.
I have tried re-soldering a few joints that didn't look too good with
no joy (although it might be taking a tad longer to go white than it
did)
Any ideas? Bearing in mind I am no expert! (although I do like
tinkering!!!)
Cheers in advance!
Phil.

 

[Michael Kennedy]

Check for caps that are high in ESR.