Trying to fix a 1.4 in Coma

[Je An]

Hi!

I got an xbox 1.4 in Coma(black screen without sound),with modchip it works only with Cromwell, XBlast or iND-Bios(loading screen), but doesn’t recognize HDD...
I’ve another two 1.4 scrap, one has dead GPU and another Fragged(stock / maybe trace corrosion)... 

Any repair suggestion? Thanks in advance!
 

[KaosEngineer]

What do you mean by "doesn't recognize HDD"?

 

Cromwell-based BIOSes do not do normal Xbox things - play games - run XBE files.  They are only used to boot Linux or flash a different non-Cromwell modified Xbox BIOS to the modchip.

What happens when ind-bios boots? 

Without a modchip when you boot up, the screen is blank and no sound.  What's the eject ring doing - flashing or lit a solid color?  Which color(s)?

[Je An]

Without modchip, or modchip with xecuter2/m8 bios get me coma with solid green LED... TSOP pads was soldered, possible bad flash.

 

But about HD, the Cromwell or XBlast can't recognize, like have no HD installed... Tried 3 or 4 HD's with different cables, 80 vias and SATA too... An because that iND-Bios stuck at "loading" screen.

EDIT: All HDD's are working in another xbox.

Edited July 27, 2022 by Je An