Hanns_G HG281D with flashing/blinking screen problems

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  • Barq
    Member
    • Jun 2011
    • 39
    #21
    Re: Hanns_G HG281D with flashing/blinking screen problems

    ok heres the inverter irt as a plastic cover on it, ihave to remove the whole thing to get it off, I will if necessary, i hope this will suffice but say the word and Ill remove it. Im gonna check those other voltages now
    Retiredcaps.
    Attached Files

      Comment

      • retiredcaps
        Badcaps Legend
        • Apr 2010
        • 9271
        #22
        Re: Hanns_G HG281D with flashing/blinking screen problems

        Leave the plastic on for now. Are those caps rated at 85C or 105C? I can't quite make it out.
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          • Barq
            Member
            • Jun 2011
            • 39
            #23
            Re: Hanns_G HG281D with flashing/blinking screen problems

            (M)105c, pic with other voltages and numbers in a minute

              Comment

              • Barq
                Member
                • Jun 2011
                • 39
                #24
                Re: Hanns_G HG281D with flashing/blinking screen problems

                ok heres the logic board
                Attached Files

                  Comment

                  • retiredcaps
                    Badcaps Legend
                    • Apr 2010
                    • 9271
                    #25
                    Re: Hanns_G HG281D with flashing/blinking screen problems

                    Originally posted by Barq
                    ok heres the logic board
                    Okay, the voltage regulators are within spec.
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                      • retiredcaps
                        Badcaps Legend
                        • Apr 2010
                        • 9271
                        #26
                        Re: Hanns_G HG281D with flashing/blinking screen problems

                        Okay, right now, if you hookup a working computer to this lcd, what symptoms are you getting? You can leave all the boards disassembled.

                        1) Is the power led on solid and steady?

                        2) Is the lcd display working correctly and displaying a picture steadily? Any sparkles?
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                          • Barq
                            Member
                            • Jun 2011
                            • 39
                            #27
                            Re: Hanns_G HG281D with flashing/blinking screen problems

                            i gotta get the thing up off the couch I have it face down and look at it. be right back

                              Comment

                              • Barq
                                Member
                                • Jun 2011
                                • 39
                                #28
                                Re: Hanns_G HG281D with flashing/blinking screen problems

                                the power light stays on blue, it will always show the bios screen and on vista it shows the startup bar but goes black after that. I got it to show the screen briefly after turning on and off, but just once. Im using hdmi , should I test with the old blue vga adapter? cant remember the name of those been so long.
                                Also Im running an old vga monitor with a vga adapter right now no probs. so I dont think its my compy. oh yeah No sparkles that only happened twice

                                  Comment

                                  • retiredcaps
                                    Badcaps Legend
                                    • Apr 2010
                                    • 9271
                                    #29
                                    Re: Hanns_G HG281D with flashing/blinking screen problems

                                    Originally posted by Barq
                                    the power light stays on blue, it will always show the bios screen and on vista it shows the startup bar but goes black after that. I got it to show the screen briefly after turning on and off, but just once.
                                    1) If you shine a flashlight on the lcd screen, can you see the Vista startup screen (with hdmi hooked up)?

                                    Im using hdmi , should I test with the old blue vga adapter? cant remember the name of those been so long.
                                    2) Yes, test the VGA port to make sure it isn't just the hdmi port that is bad. If the screen also goes black with the VGA port, can you see the display by shining a flashlight onto the screen?

                                    3) What is the part number of the black inverter transformers that sit on the long transformer board? There are 7 of them and they should all be identical part numbers.
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                                      • Barq
                                        Member
                                        • Jun 2011
                                        • 39
                                        #30
                                        Re: Hanns_G HG281D with flashing/blinking screen problems

                                        ok I tried it with the vga and it seems to work ok. I didnt sit and look at it for a long time but it seems fine. YES I can see the bios screen and microsoft startup bar with hdmi but then it goes blank. Ill get the other info for you

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                                          • Barq
                                            Member
                                            • Jun 2011
                                            • 39
                                            #31
                                            Re: Hanns_G HG281D with flashing/blinking screen problems

                                            ok 6 of the black transformers are
                                            2874014900
                                            M B 0908A but the one in the middle is
                                            2874015000
                                            MY0908A

                                              Comment

                                              • retiredcaps
                                                Badcaps Legend
                                                • Apr 2010
                                                • 9271
                                                #32
                                                Re: Hanns_G HG281D with flashing/blinking screen problems

                                                Originally posted by Barq
                                                YES I can see the bios screen and microsoft startup bar with hdmi but then it goes blank.
                                                1) If you have another HDMI cable, try another one. HDMI cables can break. Or to verify that your existing is good, try this cable between your blu-ray or DVD player and HDTV?

                                                2) If you have a blu-ray or DVD player with HDMI output, play your favourite movie and try that for the source and see if the lcd stays on longer.

                                                3) If you can access the lcd menu, see if there is a reset factory default option. Maybe the hdmi info/parameters are messed up after the power outage?
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                                                  • Barq
                                                    Member
                                                    • Jun 2011
                                                    • 39
                                                    #33
                                                    Re: Hanns_G HG281D with flashing/blinking screen problems

                                                    ill try that I even swapped the adapter from the back of the video card to the other dvi port and tried it there. still no go Ill see if I can find a hdmi cable, I dont think I have another one. BRB

                                                      Comment

                                                      • retiredcaps
                                                        Badcaps Legend
                                                        • Apr 2010
                                                        • 9271
                                                        #34
                                                        Re: Hanns_G HG281D with flashing/blinking screen problems

                                                        Originally posted by Barq
                                                        ok I tried it with the vga and it seems to work ok. I didnt sit and look at it for a long time but it seems fine. YES I can see the bios screen and microsoft startup bar with hdmi but then it goes blank.
                                                        Hmm, I don't run Vista, but if the adapter card resolution setting in Vista is set too high or low, wouldn't the lcd just go black? That would explain why the VGA works, but not the HDMI.

                                                        It also explains why the setup bar is displayed (probably because it is 640x480) and then goes black when Vista tries to load the display driver.

                                                        According to

                                                        http://cms.hannsg.net/onweb.jsp?prod...bno=33333333:0

                                                        Resolution: 1920 x 1200

                                                        Something you can try.

                                                        Hookup via HDMI, put your computer into BIOS setup mode and leave it on that screen for 5 minutes. If it stays on, then you know it is probably a Vista adapter card/lcd resolution problem.
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                                                          • Barq
                                                            Member
                                                            • Jun 2011
                                                            • 39
                                                            #35
                                                            Re: Hanns_G HG281D with flashing/blinking screen problems

                                                            nNaw Im aware of that been running common resolution between monitors. I just tried another hdmi and now Im back to the screen flashing on and off and the blue light is on continuosly. It has to be the monitor.

                                                              Comment

                                                              • Barq
                                                                Member
                                                                • Jun 2011
                                                                • 39
                                                                #36
                                                                Re: Hanns_G HG281D with flashing/blinking screen problems

                                                                also it started with windows 7 and i have it runnning vista now. Not a resolution problem.

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                                                                  • Barq
                                                                    Member
                                                                    • Jun 2011
                                                                    • 39
                                                                    #37
                                                                    Re: Hanns_G HG281D with flashing/blinking screen problems

                                                                    I also dug out another dvi to hdmi adapter for my video card and tried it. same result.

                                                                      Comment

                                                                      • Barq
                                                                        Member
                                                                        • Jun 2011
                                                                        • 39
                                                                        #38
                                                                        Re: Hanns_G HG281D with flashing/blinking screen problems

                                                                        theres another small board at the top of the monitor, I assume that is for backlighting

                                                                          Comment

                                                                          • retiredcaps
                                                                            Badcaps Legend
                                                                            • Apr 2010
                                                                            • 9271
                                                                            #39
                                                                            Re: Hanns_G HG281D with flashing/blinking screen problems

                                                                            Originally posted by Barq
                                                                            theres another small board at the top of the monitor, I assume that is for backlighting
                                                                            Post a picture of it. The long board is responsible for the the backlights.
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                                                                              • Barq
                                                                                Member
                                                                                • Jun 2011
                                                                                • 39
                                                                                #40
                                                                                Re: Hanns_G HG281D with flashing/blinking screen problems

                                                                                ok
                                                                                Attached Files

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