This set has a self diagnostic function that is really handy in situations like this. Here is how to use it: 1) Press the MUTE button on the remote control 2) Press the MUTE button again and hold it down. 3) While holding the MUTE button down, press the MENU button on the TV, and then release the MUTE button. 4) An "S" will appear on the TV screen 5) Press MENU on the TV again. 6) Adjustment Item and Value Data will now be on the screen. 7) Press "9" on the remote. 8) The set will begin it's diagnostic function. With the problem you are having, under BUS CONT, it should normally be OK, but will probably show QV01 NG, meaning that there is a problem with the video switch IC, QV01. That is a fairly common problem on many Toshiba sets. I try to keep at least one IC in stock. Lightning loves those things. QV01 = TA8851CN or Toshiba # B0384761 Corey Brazell Audio Video Electronics 12169 SC Hwy 121 Newberry SC 29108 (803) 276-9966 ----- Original Message ----- From: "peter kowalik" <pe.kow@xxxxxxxxxxxx> To: <techassist@xxxxxxxxxxxxx> Sent: Wednesday, June 18, 2003 10:55 PM Subject: [TechAssist] Tosh TZ50V51- no input selection > well Hello again, fellow techs, Have in shop a Tosh projo, had been somewhere else previously, has had some extensive reworking on the jack pack (input ass'y). Believe that input select IC may be damaged as we have OSD showing selection of different inputs but no sound or pix. Have no schematic for this set. Would anyone have schematic of input board available , would be much appreciated. Thank you Peter Kowalik pe.kow@xxxxxxxxxxxx Keith's stereo Burl Ont > **************************************************************************** * > 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/