j tag appears dead but sometimes comes on after a minute

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fersy

VIP Member
Dec 9, 2010
523
0
hi i j tagged a jasper 512 last week using the alt point kit#5 qsb and nand x.

all went well and the machine has been flying all week and was sweet this morning, however when i went to power it back on this morning nothing happened, no lights no startup nothing as if it wasnt even plugged in. thinking it was maybe the power supply i tried one of my others and it was just the same, the light just stays orange on the psu and nothing happens.

i have tried powering with eject on and its just the same however if i leave it for a few minutes sometimes it comes on it can be up to 5 mins.

thinking the nand was corrupted i flashed the nand again with a freshly made bin but still the same.

anybody any ideas?
 
F

fersy

VIP Member
Dec 9, 2010
523
0
bandit123 said:
did u even look into putting a cap on the coolrunner
Click to expand...
no i didnt because this is a j tag support section and i was using a j tag kit not a coolrunner:D

srt4fun said:
There a few possibilities.
- Try a different RF board
- Double check all solder points
- Check for standby voltages when it's being stubborn. http://forums.xbox-scene.com/index.php?showtopic=613160
- Inspect the board for loose/bridged components.
Click to expand...
already tried several boards
already checked all points visually and with a meter
already checked standby voltages :)

anyway thanks for your replies but i actually managed to get it sorted last night. i totally desoldered the jtag kit and it was still dead as a door nail however sitting with it stripped to the bare bones and pushing the button on the rol board with no success i noticed totally by fluke that if i pressed the button on the rol board it sat idle but if i then removed the rol board from its socket the green light in the psu came on so i started thinking about that and it led me back to the tiny r2p12 resistor that the end point on the kit had been soldered to. checking the kit with a meter i was able to establish this was indeed the alt point for the rol wire so i went back to the resistor gave it a hardish push with my fingernail and off it came. i use my iron on the hot side as thats just the way i prefer it and when doing the original solder job whilst i had a great connection to the resistor i must have lifted or weakened the resistors connection to the board. add to that a bit of board flex with normal heating and cooling and i reckon thats what has happened.
i took the resistor off another old board i had laying about soldering it in with my hot air wand and hey presto life after death.

cheers again tho
 
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