Did I fry the Mobo or the power supply? HELP!!!

[T Ghost]

Ok guys, I've been searching here for 2 days and found nothing that helped me to solve this problem I have now, so here it goes:

Xbox: version 1.6 (not 1.6B)
Chip:Xecuter 2.6 CE
Method of installation: Xapt3r 1.6

Ok. I first messed up with the bios, trying to install the 4928 on all 4 banks like I have on my 1.4's. Then Tried to use my lite programmer (that I used to program my Xecuter 2.3b lite +) to put the [font=verdana, arial, helvetica]Evox M8+ 1.6 from Xbins on all
4 banks. Did it sucessfully but still have the red&green frag.

Then I F... it up real bad. Tried to install the Xapt3r with the original Xbox MoBo screw BUT I FORGOT TO UNPLUG THE POWER CABLE while doing so. Xbox was off. When I finished it, the Xbox was 100% dead. No lights, no sound, nothing. tried to hear if anything powered up, nothing, like I said, 100% dead.

Once all other Xboxes I have home are 1.4's can't check the power supply.

Finally, THE QUESTION: HOW CAN I FIGURE IT OUT IF I NEED A NEW POWER SUPPLY, A NEW MOTHER BOARD OR A NEW WHOLE XBOX?

As this mod is for my "brand new" brother in law, I DESPERATELLY expect and will apreciate anybody's insight ASAP.

1st time I f.. up... feel so stupid...
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[T Ghost]

correction, i tried to put the X24983.06 bios on the chip first not the 4928.

 

[Fantmx]

Did you hear anything pop or short while you were working? Check to make sure you didn't accidentally unplug anything that would prevent the power from coming on.

 

[T Ghost]

No nothing poped or flashed or smoke. already unmouted whole MoBo and tested the power/eject button on another Xbox, evrything firmly mounted all connectios perfect and the power/eject PCB is perfect.

I'm about to use the voltimeter on the power supply to see if there's a problem there. Never used a voltimeter and I'm a little confused about settings and places to test.

Any tip will be highly apreciated!

 

[T Ghost]

I found this:

http://dwl.xbox-scene.com/~xbox/xbox-scene/tutorials/Xbox_v1.6_Resurrection.pdf

Checked with multimeter on that resistor and reading 1v and oscilating. Do you think I should assume problem on motherboard and try to replace transistor or need to do further checking to see if power supply is the problem?

 

[adnauseam]

try this handy step by step guide...it helped me make an informed decision with a 1.6 of mine that wouldnt start up.

http://www.xboxrepairguide.com/troubleshoot/index.php?episode=5

i ended up buying a cheap dead 1.6 board on ebay and replacing the transistor off it. hope this helps

 

[T Ghost]

I just did that test last night and as a good noobie got confused with the voltmeter setting. Should I use DC or AC?

 

[Rookio]

DC