Lg flatron w2230s doesnt stay on

Hello,
ok so to explain this simply, i turn my pc on and the screen shows things for 2 seconds and then goes black, ive tried it on 2 diff pc's and it does the same thing, if i turn the power of the monitor off and back on i get another 2 seconds of seeing windows then black again.
the monitor was working fine for 9 months then then flickered for a few minutes and this started happening.

any suggestions other than sending it back to lg?

ty for your time