General Firmware and OS version questions

Would this work for upgrading firmware? http://www.ladyada.net/make/usbtinyisp/index.html i'd get a bitblaster for $10, but have nothing w/ a parallel port

 

no, it will not work

 

Hello

My everdrive don't boot again, only shows a blank screen after the SEGA license screen

But I never tried to update the firmware, the only thing I remember was putting again in my consoles (American Genesis 1 non-HD, Japanese MegaDrive 2) and didn't boot.

I try the solution from the video, using the same MD2 console, the same 6 buttons joypad and the same Sonic 1 cart, without results.

Any Solutions? i don't want to wait so long sending the everdrive back to ukraine

Please help me.

Thanks in advice

 

or your cart connector is dirty, or some pin unsfoldered from one of two chips which shown on picture, by this reason your cart sometimes work, somenitme not.
how to fix if some pin really unsoldered? you can
1) resolder all pins by self if you have small solder
2) find some electronic repairmen's service in your city, mobile phone repairmen's service for example, they can resolder all pins in 5 minutes