Lg 42 in. plasma / hd flat screen television Model no.42PQ12-UD need manual

SOURCE: HDTV 42 inch Plasma Sanyo model DP 42746

the picture is very dark

SOURCE: television made a popping sound then went out

Definately repairable.
Probably a blown capacitor on the Power Supply.
A repair of this nature is 99% labor - as each capacitor costs $2.
If the power supply has failed - it can be repaired for under $200 by your local TV Repairman.

There is definately no end-user fix for this.
You must seek the expertise of a qualified technician - there are potentially lethal energies stored inside the tv, and you're life isnt worth a measly $200 repair bill.

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SOURCE: vertical bands on screen

bad x drive board on bottom of set where lines appear

SOURCE: My phillips 42" HD Flat screen won't turn on

I switched the power cord with the one to my desktop monitor and it worked ..i noticed the end going into the TV had some discolor to it ..I put the one from the TV into my desktop monitor ..and that worked too..must of been a shortage of power from the cord to the TV?

SOURCE: pink vertical line down my 42 inch digital plasma

I do believe the Panel is bad and needs to be replaced. Check with the manfacture to confirm this.