Remove the battery, near the front of the radio on the battery connector plate remove the 2 screws that are the closest to the front of the radio.
On the rear remove the 2 screws holding the top of the front speaker Assembly to the radios chassis.
Carefully pull the front speaker Assembly apart and pull the lower left flex connector off and set the speaker Assembly aside.
Look towards the bottom of the radio and you will see 2 seven pin connectors, on the left connector solder a short jumper wire to the right most pin. This is the synthesizer lock detect pin, ground this pin preferably using a clip lead to the radio chassis.
What happened was when the radio crashed it came up thinking it was a different frequency range or different frequency band and the synthesizer is unlocked, the lock detect signal places the radios controller in a loop where it never detects your top controls nor the RSS programming equipment.
Go ahead without putting the speaker Assembly back on and using a slow 486 or slower PC running true DOS try and read the radio.
If you can then read the radio then we need to program an original model codeplug back into the radio as the codeplug that you read out will most likely be for a different model.
EDITED from a real windows PC to fix F^%&*(G Android auto typing which basically sucks.
I had a simple text pix of the connectors and the pin to solder the ground jumper to but when viewing on different PC's and an android I noticed it was not lined up correctly so I removed the simple text picture, sorry for the confusion.
Follow the directions below for the correct pin to ground.http://www.repeater-builder.com/motorola/genesis/genesis-index.html
Go to the above web page and at the very bottom download the following document 'Stretching the 42-50 MHz MT1000 or P200 to the 6-meter amateur band''' Download the first copy on the web page not the 2nd copy.
Open this document and look at page 34 section 42 and it shows the correct pin to ground for lock detect disable.