[TenTec] Sick Omni 6+

[TOM]

100% CW, here are the symptoms.
Display flickers, when it does I'm in trouble. These symptoms are very intermittent.
*Outboard keyer does not key rig
*incoming sigs have a chirp
*sometimes no audio
*when the audio goes, the "S" meter doesn't work

Usually does the above from a cold start. Pushing and proding does nothing. When the display gets dimmer everything works ok. When it gets brighter one or all the above takes place....any help appreciated....Tom N4RS