I've spent about 12-14 hours working on this and am about ready to tear my hair out. I installed (6th box I've modded) an X2.6 on a version 1.2/1.3 Xbox.
The very first time I installed the chip (soldered in) the box fired up and worked fine. I was able to get the HDD formatted and copy a few things to the drive and test them out. After it had been running awhile, I restarted the box and it would 3x boot and FRAG. Not sure why it did this at all since it was working, I double and tripple checked the D0 wire and had good continuity at all D0 points, front and back, and through the grey wire to the connection on the chip.
I fiddled with the switches and finally the box would boot back up. Thinking everything was fine, I delivered the Xbox to the customer, but let him know I had a small issue with it and for him to let me know if there were any problems.
He used the box for about a week, at 1 point for almost 6 straight hours while we played Halo and Halo 2 at his place with no issues - turned it off and on several times while doing a demo for some other friends - nothing wrong.
Beginning of the this week I get a call that it's not booting up again so I had him bring it by. I plug it in and the thing fires up the very first time, no problems. So I let it sit running for a while to see if anything would happen. Next time I start it up - 3x boot with FRAG.
At this point I'm a little baffled so I pull it apart and swap the chip with another known working Xbox - same thing, 3x boot with FRAG. I then swap his chip into the other box and it boots up just fine - so I'm fairly confident it's not the chip.
I try another switch, thinking since I had to play with it before, maybe it was that - both chips FRAG on his box, works fine on mine - so not the switch.
I checked for continutity at all points (LPC, D0) and all check out fine.
So I tested the power ratings at the LPC and have this -
NOTE !!All voltages are measure using the contacts on the back of the chip itself!!
With chip ON
Voltage and Pin Location
0.00 - 16 15 - 3.30
3.30 - 14 13 - 3.30
0.00 - 12 11 - 3.27
3.27 - 10 09 - 3.30
3.27 - 08 07 - 3.27
4.54 - 06 05 - 0.16
0.00 - 04 03 - 1.71
GND - 02 01 - 0.00
With chip turned OFF (I get the same numbers with the chip removed and measuring at the pins)
0.00 - 16 15 - 3.29
3.27 - 14 13 - 3.28
0.00 - 12 11 - 3.24
3.24 - 10 09 - 3.29
3.24 - 08 07 - 3.24
4.56 - 06 05 - 3.24
4.56 - 04 03 - 0.00
GND - 02 01 - 1.20
I was kind of curious and also measured voltage through the D0. I get almost nothing with the chip enabled, but with the chip off I get a constant 4.56 volts, just like the 6 and 4 pin.
I resoldered the pin header and the D0 and tested the chip again and retested - AGAIN - for continuity and everything checks out okay - AGAIN - and get just about the same voltages.
I get nothing but 3x boots and FRAGs on the box. With the chip disabled I get Error code 05 - HDD not locked (duh, I'm not running from the stock drive).
Can someone please offer a solution or some things to try? Like I said at the beginning, I'm about ready to give up on this whole thing.
The very first time I installed the chip (soldered in) the box fired up and worked fine. I was able to get the HDD formatted and copy a few things to the drive and test them out. After it had been running awhile, I restarted the box and it would 3x boot and FRAG. Not sure why it did this at all since it was working, I double and tripple checked the D0 wire and had good continuity at all D0 points, front and back, and through the grey wire to the connection on the chip.
I fiddled with the switches and finally the box would boot back up. Thinking everything was fine, I delivered the Xbox to the customer, but let him know I had a small issue with it and for him to let me know if there were any problems.
He used the box for about a week, at 1 point for almost 6 straight hours while we played Halo and Halo 2 at his place with no issues - turned it off and on several times while doing a demo for some other friends - nothing wrong.
Beginning of the this week I get a call that it's not booting up again so I had him bring it by. I plug it in and the thing fires up the very first time, no problems. So I let it sit running for a while to see if anything would happen. Next time I start it up - 3x boot with FRAG.
At this point I'm a little baffled so I pull it apart and swap the chip with another known working Xbox - same thing, 3x boot with FRAG. I then swap his chip into the other box and it boots up just fine - so I'm fairly confident it's not the chip.
I try another switch, thinking since I had to play with it before, maybe it was that - both chips FRAG on his box, works fine on mine - so not the switch.
I checked for continutity at all points (LPC, D0) and all check out fine.
So I tested the power ratings at the LPC and have this -
NOTE !!All voltages are measure using the contacts on the back of the chip itself!!
With chip ON
Voltage and Pin Location
0.00 - 16 15 - 3.30
3.30 - 14 13 - 3.30
0.00 - 12 11 - 3.27
3.27 - 10 09 - 3.30
3.27 - 08 07 - 3.27
4.54 - 06 05 - 0.16
0.00 - 04 03 - 1.71
GND - 02 01 - 0.00
With chip turned OFF (I get the same numbers with the chip removed and measuring at the pins)
0.00 - 16 15 - 3.29
3.27 - 14 13 - 3.28
0.00 - 12 11 - 3.24
3.24 - 10 09 - 3.29
3.24 - 08 07 - 3.24
4.56 - 06 05 - 3.24
4.56 - 04 03 - 0.00
GND - 02 01 - 1.20
I was kind of curious and also measured voltage through the D0. I get almost nothing with the chip enabled, but with the chip off I get a constant 4.56 volts, just like the 6 and 4 pin.
I resoldered the pin header and the D0 and tested the chip again and retested - AGAIN - for continuity and everything checks out okay - AGAIN - and get just about the same voltages.
I get nothing but 3x boots and FRAGs on the box. With the chip disabled I get Error code 05 - HDD not locked (duh, I'm not running from the stock drive).
Can someone please offer a solution or some things to try? Like I said at the beginning, I'm about ready to give up on this whole thing.