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

Collapse
X
Collapse
 
  • Page of 2
  • Time
  • Show
Clear All
new posts
Previous 1 2 template Next
  • nomoresonys
    Badcaps Legend
    • Jan 2013
    • 12091
    • 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
            • 6355
            • 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

                                      Previous 1 2 template Next

                                      Related Topics

                                      Collapse
                                      • advant
                                        Driving a Sharp TCON/panel with a universal main board
                                        by advant
                                        This thread is about trying to get an Universal Main Board to work with a Sharp TCON and panel.

                                        I have a Sharp LC-46D85UN TV that has had a main board issue. Since this model is from 2009, I am not able to find an exact replacement of the main board. Instead, I decided to see if I can future proof this tv by getting a Universal Main Board (T53U21.2) from China to work with the Sharp TCON (CPWBX4291TPZA) and panel. The universal main board supports a 8 bit dual channel LVDS interface whereas the TCON requires a 10 bit dual channel LVDS input. I have modded the LVDS connector to match...
                                        02-03-2020, 12:25 AM
                                      • barry101
                                        Apple 820-3662 VCore shorted to ground.
                                        by barry101
                                        Hi, Would appreciate some help.
                                        I have an Apple Late 2013 15" A1398 MacBook Pro with Logic Board 820-3662.
                                        Get charger light but no fan spin or chime. No liquid damage.
                                        Found PPBUS and VCORE both shorted to ground. Other rails were ok.
                                        Removed VCORE MOSFETS U7310, U7320 and U7330. Found U7330 was in fact shorted.
                                        With the 3 MOSFETS removed, get PPBUS and fan spin. VCORE is still hard shorted to ground (0 ohms).
                                        Attempted voltage insertion on VCORE to locate short using bench supply set at 1.0 VDC and 4.95 Amps (max current for my...
                                        06-24-2025, 07:34 AM
                                      • sefoster
                                        Sharp Aquos Lc-80LE757U flashing Sharp on screen when plugged in
                                        by sefoster
                                        I have a Sharp Aquos LC-80LE757U that randomly made a loud popping noise when when watching TV one day. We found that the fuse blew and the thermistor. We ended up replacing the entire power supply board and have also replaced the TCON board. Now as soon as I plug the TV in it lights up and has the Sharp logo flashing on and off of the screen. If I unplug the ribbon cable from the TCON board to the main board I get the 2 long 5 short error code. Any ideas on where to go from here? We've tried resetting it but nothing has worked. If we plug it in and let it cycle through the flashing of the Sharp...
                                        11-20-2022, 09:29 AM
                                      • SONY_E-WASTER
                                        Help! Sharp LC-70UE30U 3 long flashes + 3 short flashes.
                                        by SONY_E-WASTER
                                        Hello, I'm new to this forum. I like to tinker with Sony electronics, I have been lucky trouble shooting sony stuff, But I can't find much info on this Sharp TV.

                                        The problem; plug to power>white led power indicator light is on>it turns on to the red Sharp logo>
                                        then the android logo is displayed, lit fine then the android logo brightness varies, then lit normal, then the tv restarts and does the same startup logos over and over for 5 times then it turns off and the power indicator light flashes the trouble code 3 long blinks plus 3 short blinks .

                                        does...
                                        12-26-2021, 05:46 PM
                                      • gavenb
                                        Sharp LC-80LE661U 80 inch
                                        by gavenb
                                        Hi folks!
                                        I have a LC-80LE661U that had some interesting issues.
                                        Initially, it would come on and show the sharp logo and would show normal static before shutting off.

                                        I started troubleshooting by disconnecting the led lighting strips and turning it on. It would do the same thing - come on, show the sharp logo and shut off. After reading, it was suggested to replace the main board. That was replaced and the same symptoms resulted. After this and some reading, the parts cannon got loaded up. I replaced the power board, same issue. Replaced the Tcon board and now it...
                                        11-12-2023, 02:05 PM
                                      • Loading...
                                      • No more items.
                                      Working...