damatt: See the red dots on the picture below
Excellent. The screw under the serial # sticker was the one I missed.
Anyways, I opened and disassembled the rest of the Beo4 but could not find any obvious signs of moisture remaining in the unit. Unfortunately, when it powers up it continues to show only V.MEM after any button is pressed. Is there anything else I can try before declaring the Beo4 a loss? Thanks.
One more thing. I found some previous posts detailing how to examine the EEPROM and software versions. Pressing List+Standby and then MENU+GO just results in the same V.MEM indicator. Maybe the EEPROM has been zapped into a bad state?