I have had tons of problems getting various Easy models to load rrg properly… it honestly takes a slog of different variations to get it working… I have two different Easy models both with 512k and both required slightly different approaches… one of these approaches tend to work;
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hold button down, power up, keep holding, run pm3-flash-bootrom, once finished, let go of button but let it flash lights and do whatever the heck it wants to do, see if com port comes back eventually, if com port appears pull cable or if after 30 full seconds (count them on the clock) no com port, pull cable, hold button, plug in, keep holding button, run pm3-flash-fullimage, once done let go of button, let LEDs dance around, wait 60 seconds, pull cable, plug cable in, result?
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hold button down, power up, keep holding, run pm3-flash-bootrom, once finished, pull cable while button held, plug cable back in with button held, run pm3-flash-fullimage, once done let go of button, leave alone while LEDs dance around, wait 60 seconds, even if com port re-appears pull cable, plug cable in, result?
Essentially I’ve had to work out various dances with the button and cable pulling to get the bootloader and full image to run on these two different but identical looking Easy units got from two different chinese vendors. The trick for me was always to work the button like nobody’s business and never assume things were going to plan… try variations on holding the button, flashing, pulling the cable with button held after or letting the button go and letting the unit attempt to sort itself out. Sometimes the initial com port when holding the button would be 3 and then during “normal” operation it would change to like 6 or whatever, so the flash process would be looking at the wrong com port… it’s really annoying how these things go but I once had to hold the button while re-typing to update the correct com port to finish the flash process… anyway… keep trying… you’ll get it sorted I’m sure.