Corona beeps only, won't power on

[wmb88]

I was installing RGH for this Corona 4GB Xbox360. All went well, Xell booted then freeboot image also booted fine. I quickly unplugged the power plug at back while the Xbox was on. I then desoldered programmer and cleaned solder points. But when tried to boot again, the Xbox just beeps only , it won't turn on any more.

I then wrote the original nand back and removed everything, the box still beeps only , won't turn on. I also measured stand-by voltage, 3.3V reads fine as well as 1.2V voltage.

I guess something went wrong when I quickly pull off the power plug from the back while the Xbox was on.

What could be damaged? SB ? or 4GB nand went bad and needs to be converted to 16MB?

 

[Mikaz]

Try to solder programer back ant turn it on. Sometimes you mess with those 4GB model soldering points. Also post your install pics of soldering point, wires install and glicher.

 

[wmb88]

here are the pictures taken after I removed everything and cleaned. Can't see any pads/traces is damaged .

 

[wmb88]

Fixed ! it was one of the 22 ohm resistor become 125k, just shorted it and the Xbox boots again !

I guess it was damaged when I cleaned the board.

 

[akagd]

am having the same problem can you post a pix of the 22 ohm resistor

 

[wmb88]

am having the same problem can you post a pix of the 22 ohm resistor

see the first picture, on top of the 4GB nand chip, 4 resistors are all 22ohm, in my case it was R1D5