SHARP LC-70UQ17U standby but no backlight or video =(

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  • nomoresonys
    Badcaps Legend
    • Jan 2013
    • 12122
    • U.S.
    #21
    Re: SHARP LC-70UQ17U standby but no backlight or video =(

    video there, most of them work in a similar manner, he's testing without dismantle at about the 5 minute mark, that test at 5 minutes do with tv unplugged, the tester will do the work: https://www.youtube.com/watch?v=Gkxm8jqqbQs
    Last edited by nomoresonys; 01-16-2021, 07:38 AM.

      Comment

      • budm
        Badcaps Legend
        • Feb 2010
        • 40746
        • USA
        #22
        Re: SHARP LC-70UQ17U standby but no backlight or video =(

        You should also retest those Voltages you reported since there are so many errors as shown.
        Never stop learning
        Basic LCD TV and Monitor troubleshooting guides.
        http://www.badcaps.net/forum/showthr...956#post305956

        Voltage Regulator (LDO) testing:
        http://www.badcaps.net/forum/showthr...999#post300999

        Inverter testing using old CFL:
        http://www.badcaps.net/forum/showthr...er+testing+cfl

        Tear down pictures : Hit the ">" Show Albums and stories" on the left side
        http://s807.photobucket.com/user/budm/library/

        TV Factory reset codes listing:
        http://www.badcaps.net/forum/showthread.php?t=24809

          Comment

          • Diah
            Badcaps Legend
            • Feb 2013
            • 6357
            • Germany
            #23
            Re: SHARP LC-70UQ17U standby but no backlight or video =(

            Originally posted by anthony_c
            Hi all,

            I have the dreaded 2-5 blink code.
            which LED color you have the 2-5 blinking code ?? RED with GREEN or ONLY RED !!!!

            yours First post measurements all mysterious , maybe yours Digital meter battery low.. so .. post clear photos on yours power boards especially the socket label which goes to main boards.

              Comment

              • anthony_c
                Member
                • Jul 2019
                • 49
                • United States
                #24
                Re: SHARP LC-70UQ17U standby but no backlight or video =(

                Originally posted by nomoresonys
                video there, most of them work in a similar manner, he's testing without dismantle at about the 5 minute mark, that test at 5 minutes do with tv unplugged, the tester will do the work: https://www.youtube.com/watch?v=Gkxm8jqqbQs
                Ok, will follow and report back.

                  Comment

                  • anthony_c
                    Member
                    • Jul 2019
                    • 49
                    • United States
                    #25
                    Re: SHARP LC-70UQ17U standby but no backlight or video =(

                    Originally posted by budm
                    You should also retest those Voltages you reported since there are so many errors as shown.
                    Will do and report back @budm, its a bit hard being that the TV is so huge. I HAVE to test it with the board plugged into the TV right?

                      Comment

                      • anthony_c
                        Member
                        • Jul 2019
                        • 49
                        • United States
                        #26
                        Re: SHARP LC-70UQ17U standby but no backlight or video =(

                        Originally posted by Diah
                        which LED color you have the 2-5 blinking code ?? RED with GREEN or ONLY RED !!!!

                        yours First post measurements all mysterious , maybe yours Digital meter battery low.. so .. post clear photos on yours power boards especially the socket label which goes to main boards.
                        Only blue, no other color. I will post clear photos for you tomorrow when I get back to the TV.

                          Comment

                          • anthony_c
                            Member
                            • Jul 2019
                            • 49
                            • United States
                            #27
                            Re: SHARP LC-70UQ17U standby but no backlight or video =(

                            Welp guys, I think I have bad news =(

                            After spending so much time , I finally connected the backlight tester and it does seem that the panel is cracked. It was working fine while on the wall and sat in the same place since it was dropped of to me so I suppose it was cracked in transit. It makes sense because the guy said he wasnt getting any blinking only distorted picture when he took it off the wall.

                            This sucks as I am pretty sure, originally this was a driver issue which I could have fixed by cutting out the tabs but now theres nothing that I can do =(

                            Posting pictures shortly.

                              Comment

                              • anthony_c
                                Member
                                • Jul 2019
                                • 49
                                • United States
                                #28
                                Re: SHARP LC-70UQ17U standby but no backlight or video =(

                                Here are the links to the images:



                                Last edited by anthony_c; 01-18-2021, 02:05 PM.

                                  Comment

                                  • anthony_c
                                    Member
                                    • Jul 2019
                                    • 49
                                    • United States
                                    #29
                                    Re: SHARP LC-70UQ17U standby but no backlight or video =(

                                    If indeed the panel is cracked, is it worth stripping it down for anything? Or should I just dump it?

                                      Comment

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