PS3 CECHH01 black Screen, no usb power, etc

Since my friend doesn't play online anymore, he decided to downgrade it. That's where I come in to do that work. After flashing the ps3, I was going to install Rogero Downgrader, but I got stuck in the please wait screen. So I turned off ps3 and then realized the blueray drive was loose, so I connected it. After that, I turn on ps3 but no video. Changed hdmi and it worked but this time I got no usb power. So after I turned it off. When I turn it back on I get black screen, no usb power, can't see safe mode. Is my friends ps3 good??? I know it's not glod since I can turn off ps3 with the power button. Do you guys have any solutions????? I need this ASAP, any help is appreciated

Do I have to flash the original backup, or do I just use flash fun with the patched?

What do I do with the Leer.bin? Do I flash it with the backup?

Do I flash fun the leer.bin file or do i keep all the switches down? Do I have to rename the leer.bin?

Tried the Leer.bin and the repatch, but then when I got to the update, I managed to reach the update screen, the 2nd screen for installation, then I got a black screen. Don't know what's wrong with it or something.