MacBook Late 2008 Backlight repair


hi guys,
have macbook late 2008, 820-2327-a app001 592.4t, 0823a wled qfn.
i'm wondering if me pinpoint locations on logic board should troubleshooting, i've located f9800 fuse , replace (ordered pack of 2a, 32vdc quick blow fuses, type 0402).

lvds connector , cable looks fine, if know how troubleshoot multimeter please feel free , describe process. picture on screen (visible when lit flashlight)

wondering if of point me in direction of other places should continuity, , possibly ohms expected @ locations. i'm including 2 pictures of front- , backside of board circle areas if help.

regarding wled, i've seen these available ebay has different numbering on them, these http://www.ebay.com/itm/171643360356?_trksid=p2060353.m1438.l2649&sspagename=strk:mebidx:it work on logic board?

i've got schematics , "test link drawing program" i'm quite ready start exploring, schematic skills aren't top-of-the line, instances referred "lcdbklight" or similar important check? i'm little uncertain for, noticed in schematics there little comments regards voltage, guess that's for? mentioned, appreciated things going.

caused issue, friend of mine (who gave me machine) said using app "switch" , there strange clicking noise within , went. if feels familiar clicking/ ticking noise in relation backlight issues, please let me know. , oh, lcd replaced on board, external screen works not gpu either.


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