Gary, I had a 27" Panasonic TV with that same symptom. I thought it was in closed caption text mode but that wasn't the case. Turned out to be the eeprom. Daryl Daryl's TV 3310 Dyer St. El Paso, TX 79930 915-565-9184 915-564-1024 Fax dthunhurst@xxxxxxx http://dynacomp.freeyellow.com -----Original Message----- From: Gary McCartney <gary@xxxxxxxxxxx> To: techassist@xxxxxxxxxxxxx <techassist@xxxxxxxxxxxxx> Date: Wednesday, July 16, 2003 3:02 PM Subject: [TechAssist] Panasonic TV/ VCR PV-M1358W-K Chassis KM-138, black box on screen >Customer called me up and says that he was adjusting the clock in the >menus and from then on he has a big black box on the screen (all except >the outer edges of the screen which the picture shows through). >Sometimes the letters [ffff] in white lettering show up in the top left >corner of this black box. When he changes channels, the picture is ok >for about 5 seconds then the black box returns. Problem occurs during >VCR playback also. The regular green colored on-screen graphics are >functioning normally. > >Does anyone know if this is just some kind of microprocessor glitch that >can be reset somehow, or a menu option to escape this, or is there a >defect in the circuitry? I told him to leave the set unplugged for a few >hours but warned him that it probably wouldn't solve it. If it is the >circuit, I won't be able to work on it for a week. > >Thanks for any help. >-- > > > > >Gary McCartney > >McCartney Electronics >7134 Fife Rd, RR 7 >Guelph Ontario Canada N1H 6J4 >Fax: (519)821-1530 >email: gary (at) number63.ca > >*************************************************************************** ** >CHECK OUT THE NEW CHATROOM! Just login and click on chat! >http://www.tech-assist.org/secure/tip/main.htm >The Tech Address Book: >http://www.tech-assist.org/secure/tip/contact.htm >Add a Repair Tip Here, or Change/Remove your Email Address: >http://www.tech-assist.org/secure/tip/main.htm >Lost Password: >http://www.tech-assist.org and select "Lost your Login Info?". >Email Archives: >//www.freelists.org/archives/techassist/ > ***************************************************************************** CHECK OUT THE NEW CHATROOM! Just login and click on chat! http://www.tech-assist.org/secure/tip/main.htm The Tech Address Book: http://www.tech-assist.org/secure/tip/contact.htm Add a Repair Tip Here, or Change/Remove your Email Address: http://www.tech-assist.org/secure/tip/main.htm Lost Password: http://www.tech-assist.org and select "Lost your Login Info?". Email Archives: //www.freelists.org/archives/techassist/