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Author Topic: Xenon Jtag - No Won't Boot - No Power  (Read 39 times)

akula169

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Xenon Jtag - No Won't Boot - No Power
« on: February 02, 2020, 06:38:00 PM »
I've done some searching/browsing, but I'm at wits end on this one.

I have a Xenon that decided to go E79 today, so I figured I'd open it up and try re-flashing it.

Soldered my parallel port programmer wires back into the nand holes and Nandpro started throwing read errors right off the bat.

So I unplug everything.  I plug in the xbox (LPT not connected to PC) and the box will not power on - not with the power, eject or a wired controller's big X button.

I unsolder the NAND wires - still nothing.  Just for kicks, I soldered the NAND wires back and tried to read with nandpro again - now it says it can't find a programmer (to be expected if there's no power getting to where it needs to be).

I read about others that had similar problems thanks to some solder splashed shorts - and in those cases I read that the power supply light went to red.  Mine is still amber when plugging the box back in.

I'm not sure where to start.  I'm sure solder splashes are a very very slim possibility, as all I did was reheat the solder from the previous wire install I had - I didn't add any new solder to the board at all.

I also checked all the NAND wire holes on the board for shorts with a multimeter - nothing out of the ordinary.

Anyone have other ideas that might lead me to what's causing the box to not power on?

This post has been edited by akula169: Yesterday, 02:39 AM
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jigglywiggly

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Xenon Jtag - No Won't Boot - No Power
« Reply #1 on: February 02, 2020, 11:13:00 PM »
Are you getting a 3.3v/5 volt going through the xbox? Check with a multimeter, I doubt you are going to find you have a 12v going through.
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kjkool

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Xenon Jtag - No Won't Boot - No Power
« Reply #2 on: February 03, 2020, 01:15:00 AM »
Try using the quick bridging of pins 44-47 method .. i've recovered "dead" nands this way a couple of times (IMG:style_emoticons/default/smile.gif)

http://www.elitemodscene.com/forums/viewto...p?f=45&t=30
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akula169

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Xenon Jtag - No Won't Boot - No Power
« Reply #3 on: February 03, 2020, 10:47:00 AM »
Somewhere between the bad flash and about six beers, I realize that I had soldered pin 18 to the wrong place.

It is writing now...  hopefully it was a bad flash that was causing the power issue.

Thanks for all the suggestions!  Appreciated.  I'll certainly keep the pin shorting stuff in mind next time - I never did find any of that info in my "jtag won't power on" searches.
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