Thank you @kallasr. My menu doesn't have "autodetect". For BV4-65 it only lists the following options:

• BeoVision 4-65 D7
• BeoVision 4-65 D8
• BeoVision 4-65 D9

Not sure which one I should pick, but I've tried them all. Same result--I can power up the plasma with Panasonic remote only. Then everything works as expected. Any other ideas to try?

Still stuck. I went through my Service Menu items 3 times and I could not find such "auto-detect" option. I am attaching some sample screenshots which show what I see in that service menu. There were a couple of places that look suspicious, so I've circled them red. My Display 1 is set to "BeoVision4-65 D9" currently.

The screenshots can be seen here: https://drive.google.com/open?id=0BzY5RcNnTvKSSF9fWWRNb1JyX28

Thank you.

deeonline wrote:

Still stuck. I went through my Service Menu items 3 times and I could not find such "auto-detect" option. I am attaching some sample screenshots which show what I see in that service menu. There were a couple of places that look suspicious, so I've circled them red. My Display 1 is set to "BeoVision4-65 D9" currently.

The screenshots can be seen here: https://drive.google.com/open?id=0BzY5RcNnTvKSSF9fWWRNb1JyX28

Thank you.

Check if the RS-232 (serial) cable is connected properly (Monitor on BS3) to serial (BV4). This cable allows the Beosystem 3 to recognize the screen as B&O (it is not recognized as such in the service menus you posted) Check for bent pins or pins that were pushed inside the plugs.

Good luck,

Jean

Thanks Jean. This is a good idea. I've checked the connection and it is hooked up to the "Monitor" port on BS3 and the "Serial" one on BV4-65. I've tried 3 different null modem DB9 cables already. Same issue. Wonder if I should try to remove the cover on BV4-65 and buzz all wires with a multimeter to ensure they are still connected to the serial DB9 pins.

To access the menu for autodetect I found this old thread:

/forum/imported-unmapped/bl3500---keine-funktion-mehr-252ber-fb

Ralf

Thank you Ralf for passing this on. I've followed those instructions to bring up the Customer Service Menu and confirmed that Autodetect is set to ON. When I turned this setting off, the image was lost. I had to use a computer monitor to see it again. I've tried selecting different resolutions, including 1366x768, but still couldn't get any picture on BV4-65. Once I've changed it back to "Autodetect: ON", BV4-65 started showing picture again. However, I still see that it doesn't detect my plasma screen as B&O type. This is what it shows for Screen 1:

• MANUFACTOR: MEI
• PRODUCT: TY-42TM6D
• TYPE: NON B&O
• RESOLUTION: 1366x768p

A tiny correction to the post above. I was able to get the picture with "AUTODETECT MONITOR" set to "OFF" and the resolution manually set to 133x768p. Just had to disconnect and reconnect the power cable on the plasma screen a few times. Even with the monitor type set to "BeoVision 4-65 D7" I still can't get it turned on or off via the serial port. Visual inspection of DB9 pins on both ends don't raise any red flags. All pins appear in the original working condition. 😮 

Wonder if I maybe try to measure signal on the DB9 transmit data pin with an oscilloscope to see if any kind of signal is being set by BeoSystem 3. Don't want to purchase an oscilloscope unless I have to, but don't see what else to try here.