LG FA162 - Reading Ok Check (= No Disc Display)

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ELECTRICAL TROUBLESHOOTING GUIDE OF CD PART
5. READING OK CHECK (= “NO DISC” DISPLAY)
Check connector locking.
(CN401, CN403)
Check CN401
Pin13, 16 (FA+, FA-).
Defective
pick-up or IC400 or IC401.
Check CN401
Pin3, 4 (SL+, SL-).
Defective
pick-up or IC400 or IC401.
Check CN401
Pin10 (LD).
Defective
pick-up or IC400 or IC401.
Check CN401
Pin5, 6 (SP+, SP-).
Check CN401
Pin14, 15 (TA+, TA-).
Defective
pick-up or IC400 or IC401.
Defective
pick-up or IC400 or IC401.
Is reading OK?
Does sled move?
NO
#B
#A
#C
#D
#E
NO
Does lense move?
(= Up & Down)
Does laser light?
Does spindle lotate?
NO NO
NO NO
NO
NO
NO
NO
YES
YES
YES
YES
YES