Standby problem

bear.....my HMDA400 CRT Sony ..is doing the same thing....you need to discharge the CRT of static, then open the case and vacume the boards, heat sinks and every thing soldered down, strap grounds and the glass tube CRT.

Then run the self diognostic from the manual ..its simple and will tell you if the problem is major...usually it is a pwr issue...ie the pwr strip outlet may be shorting or pulsing erratical out put....bad strip......if the self diognostic shows the monitor is bad....best thing to do is replace the main monitor PC board to avoid testing other componants with speciality equpment you don't have! Last resort replace the CRT...the most expensive piece of the puzzle...ie the picture tube it self...

try a good known monitor on your system to be sure you don't have a software, or CPU problem or pwr glitch.....know this ,a black screen with no raster(lines, visuals) could be a sign of a faulty FBT(fly back transformer)...it happens with CRT units...sucks doesn't it...and you would be advised to" wear rubber gloves" to replace the FBT yourself....because of the dangerous voltage stored in the damn things.....its the current not the voltage that is deadly.....two hands on any circuit is not good....one hand at a time when taking parts out and putting them in.....get rid of rings watches and other conductive bling on your wrists and hands!....you will thank you me for that! good luck!