There are two methods of starting a recovery mode session, either by powering up first (USB disconnected) in the mode as you have tried, or by doing the same thing- without powering up manually.
Starting with the e200 OFF, slide the HOLD switch to the right (orange), then hold the REC button depressed while plugging in to the USB port. The device will power up as it sees DC power on the USB bus.
If you are not getting started up properly, it’s entirely possible that yout problem might have a simple cause, the memory board may have dislodged from the main board. To check this, remove the metal rear cover, being careful that those wee screws don’t fly away on you. At the top of the machine, you’ll see a black rectangle, and within this, a grey foam block.
Press downward gently on that foam block, and see if the “daughterboard” snaps into position on the connector.
Let us know how it goes!