Philips model PC6220 C121 Chassis 20U6 Commercial model used as a Channel One monitor First time working on one of these. Set came in with bright screen with retrace lines. Replaced open R562 and burnt R573. Now have normal screen with snow with no signal. OSD is normal. When I connect a signal or tune to an active channel it shuts down immediately. Is this normal without the Channel One receiver connected or do I have a problem? High voltage and B+ are normal. Shuts down with CRT socket disconnected. Tried with Channel One input card unplugged also. TIA Bill Bill's TV Service Sulphur Springs, TX ------------------------------------------ Submit A Repair Tip For Everyone Here: http://www.tech-assist.org/secure/tip/main.html ------------------------------------------ To REMOVE your email address, click here: http://www.tech-assist.org/unsubb.html To CHANGE your email address, click here: http://www.techassist.net/forms/change.html