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Author Topic: Fixing A Bad Attempt At A Jtag  (Read 774 times)

MrGeekFreak

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Fixing A Bad Attempt At A Jtag
« on: September 18, 2013, 02:20:00 AM »
I purchased an old Jasper 360 from someone on Craigslist a few months back, with the intention of JTAG-ing it. The previous owner had attempted the modification, but apparently had some issues. The motherboard was left in a bit of a sorry state, but it seemed to be workable.

Finally getting around to it, I soldered the LPT cable in, but couldn't get anything to show up in NANDPro. Upon checking the pins of the cable, and on the motherboard itself, I believe I found the issue.

First off, the R1R1 resistor had been pulled off of the board. I fixed this by following the trace, and soldering on another one. But, I then noticed that J1D2.1 is only at about 0.01v, while J1D2.3 is at 1.1v.

Does anyone have an idea of what the issue could be?

This post has been edited by MrGeekFreak: Sep 18 2013, 09:31 AM
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