Read JBL BD 100 (serv.man2) Service Manual online
No video display
Check ifR188 is on
Go
No
No Video display
Add R188
Replace the main board
Yes
Check If L456 is on
No
Add L456
Trouble shooting chart
5- 5
Click on the first or last page to see other BD 100 (serv.man2) service manuals if exist.