Hard Reset SB5101 / Debrick - SurfboardHacker Forums

This does NOT work with the TCNiso USBblackcat, nor does it have these capabilities don't polute this thread with the BlackcatUSB

This should ONLY be attempted IF;
1) you know your Jtag works, (i.e. if a parajtag has worked on other modems and your not using the blackcat software).
2) You cannot detect the flash of your modem using the SBHUsbJtag or a Parajtag running Tom's Jtag Util.
3) When you power up the modem all the lights come on and then immediately go out.

Solder some thin wire to the RH leg of the 3.3v power source then run the other end QUICKLY over the 5 inside Jtag pins, then connect your Jtag then enter these commands;

Method 1.
poke fffe230c 3
poke fffe2304 0
poke fffe2300 a
poke fffe2300 9
poke fffe2300 9
poke fffe2300 9
poke fffe2300 9
poke fffe2300 9
poke fffe2300 9
poke fffe2300 9
poke fffe2300 9
poke fffe2300 1c
detect (MAY HAVE TO RE-DO the POKE COMMANDS A FEW TIMES IF DETECT DOES NOT WORK)
ldram 9fc00000 (Select the 2mb dump file)
program 9fc00000 200000


Method 2
detect
ldram boot (Select boot file)
erase boot
sprogram boot
(Power off the modem)
detect
ldram 9fc00000 (Select the 2mb dump file)
program 9fc00000 200000

Textbook Flash chip reset;
Another method is shown in the pic below. 3.3v is applied to the pin 12 of the flash TSOP to reset it. I would recommend soldering a fine wire to the #12 lead first then apply power to it for about a second. You don't wan to accidentally touch the pins on either side. the #27 pin is already attached to a common ground on the PCB.

Attached File(s)

• Attached File 5101debrick.jpg (444.75K)
  Number of downloads: 5882
• Attached File tsop_reset.jpg (79.48K)
  Number of downloads: 4845