Many have reported success using this method,
all credit to n2610 @ cccam forum for this guide.
If somebody has smargo "damaged" by update but the geen LED is lighting after plugging to the USB there is probably chance to bring it back life
Make simple test:
1. insert smargo to USB - green LED should light but system doesn't recognise device.
2. insert some smart card revrserd to the slot to active card detect only - green led should start blink.
3 instert card properly - green led should be dark
If all points pass it means u have some chance to repair smargo.
To repair it u must open the case to have access to the electronic board.
Put the board USB plug up.
At right side u should have small 3 pin transistor and more at rite side 3 holes placed vertically.
We are interested in this small transitor.
It has 3 legs/pins up and 1 down.
We are interested in it's right up leg/pin (base or gate).
Solder small wire to this leg/pin and connect second side to GND.
If you afraid about transistor (normally it has resistors inside) you can use small resistor (~1kB) instead of wire.
I've connected it small capacitor located below r-pack (right side of the capacitor) but u can connect it anywhere u find GND
After that u can connect smargo to the PC and it should be normally detectable.
Run ./srp_update_x86 -b to activate bootloader mode.
Remove and reinsert smargo.
Run ./srp_update_x86 -f to flash reader again.
If u see this message:
start flashing
################################################## ######## done
Please remove and reinsert SmartReader+
wait about 2-3 minutes and then disconnect your smargo reader.
After this process u can remove the wire and smargo should be alive again
Probably not all smargo will get up after this process but is probably the most of them get a cure
Picture shows the two points used in this guide ( red line )
Good Luck !