Hello.
I have the same problem but mine is weird.
My GB Boy colour worked with common batteries 1.5V non rechargeable with ED GB X3. I updated to X7 and it doesn't work anymore, even with 3000mAh rechargeable, I have a 38 error saying the bin file is missing, sometimes nothing, like a lck of power indeed. The X7 works well on genuine GB and GBC without mod and even on GB pocket backlit mod.
Any solution ?
Thanks