I have an IBM branded rr501 which regularly locks up. After a lot of googling I found that it might be related to dim commands. Sure enough, I can very reliably lock it up with an RF remote by holding down the dim button.
Has anyone written a summary of what is known about this lockup?
I found some discussion of a similar lockup in the TM751, and possible solutions involving changing the gain of an amplifier stage. "I now suggest replacing the 1k resistor found between pins 3 and 6 of the LM358 op-amp on the TM751 RF daughter board with a 3.9k resistor." Is this the definitive fix for the TM751?
Anyone know if a similar fix works for the rr501? I did try reorienting the antenna, with no effect.