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technosonic lcd1908 makes a hipitched noise

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mac18:
Hi hope someone can help me I have a technosonic lcd 1908 that makes a high pitched noise after being on for about 10 minutes, I think its something on the power supply side but am not sure.
Any help would be great thanks. :unsure:

tv tony:
change the blue ceramic cap in the snubber network and separate the two chokes on the secondary side of the psu, if you want circuit refs ill post tomorrow
tv tony

mac18:
 Managed to get the ceramic cap after many hours of searching changed it and separated the the two chokes all well at the moment.
THANKS TO TV TONY FOR HIS ADVICE.
 
 

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