Toshiba 520 black screen

[Mr Spock]

Cars doesnt have firmwares i know

If there is something wrong with firmware or LGC and SYS,why scanner lamp stays on,when is disconnected from SYS board?

Please help me

Actually cars (most modern cars anyway) do have firmware. It is in the onboard computer. My brother is a mechanic and flashes these on the vehicles he works on.

Power for the scanning lamp comes from the power supply. Then should be controlled by the slg pwb which is also controlled by the sys pwb.
If the wrong firmware was installed then you could have caused this. Also the toner spill into the power supply could have damaged a section that supplies power to the lgc pwb which would cause all of the symptoms you described. If you have another machine I would try power supply first. Then lgc pwb since you can not get the recovery jigs (about 1,000 usd last I checked).

[dogg_man]

If you got a F111 its the scanner but you need to use recovery jigs at this point. USB update will not work.

[emujo]

Wait for it, wait for it...."Can someone please send me the recovery jigs"!!!! Emujo