Proscan 42LA45H PSU Problem

Collapse
X
Collapse
 
  • Page of 3
  • Time
  • Show
Clear All
new posts
Previous 1 2 3 template Next
  • nwcs
    Badcaps Veteran
    • Dec 2015
    • 311
    • usa
    #41
    Re: Proscan 42LA45H PSU Problem

    let me correct that. I get all of the correct voltages except on which is 0v. This all happened after I replaced three bad caps in the power supply and was running a burn in test. Everything was fine until I turned unit off. I am pretty sure the main is the issue.

      Comment

      • CapLeaker
        Leaking Member
        • Dec 2014
        • 8081
        • Canada
        #42
        Re: Proscan 42LA45H PSU Problem

        so you have no backlight? main board is sending BLon, so if you have nothing there, then the main board is at fault.

          Comment

          • nwcs
            Badcaps Veteran
            • Dec 2015
            • 311
            • usa
            #43
            Re: Proscan 42LA45H PSU Problem

            That is kind of what I thought. Right before I turned the tv off there were raster lines in the video but not in the menu.

              Comment

              Previous 1 2 3 template Next

              Related Topics

              Collapse
              • jb_Bak
                Sony xbr-65x900c main board issues?
                by jb_Bak
                Hey guys great forum glad to have found it. I bought a Sony XBR 65X900C cheaply because it didn't work. No signs of life at all not even a light/led. All I hear is a brief high voltage sound when I throw the power to it.

                Didn't see any obvious signs of damage so right away started checking voltages. This is what I see:
                Power Board Connector that goes to Main board
                CN6401
                Pin 01 NC
                Pin 02 NC
                Pin 03 "BL_ON": 0V
                Pin 04 "N/C"
                Pin 05 "STBY 3.3V": 3.5V
                Pin 06 "GND": N/C
                Pin 07 "AC_OFF"...
                09-27-2021, 04:52 PM
              • blind2reply
                proscan 40ld45q - no pic -no sound - no backlight - blue light turns off
                by blind2reply
                proscan 40ld45q

                Have tried published resets with no help. (unplug for 10, push on-off for 30, push menu and vol +, etc.)

                After being plugged in, red light comes on. Push power button and blue light comes on for ~five seconds then goes out. Power button does not turn the unit on a second time - have to unplug/re-plug before power button will try to start with blue light.

                No sound, no picture (used flashlight test).

                No bulging cap, no burn spots, no burn smells, nothing visual (cold joints/breaks/bugs).

                Digital voltmeter;...
                06-06-2021, 01:16 PM
              • birdboy385
                Proscan 50" PLCD5092a-b Restarting
                by birdboy385
                Hi all, I have the aforementioned Proscan television. Basically what happens is the TV will boot up like normal once you push the power button, the Proscan logo shows then it shows the channel select and almost immediately you see the date in the corner reset ( I can't recall what to but I semi assume it doesn't matter).

                The TV then freezes for a few moments then restarts. The Proscan logo shows up and the cycle continues pretty much indefinitely. I haven't attempted to let it sit for long to see if it would ever stop doing it. Once the Tv boots up, attempting to push any buttons...
                02-13-2019, 10:33 AM
              • lapfix
                Dell Latitude E5550 LA-A911P no complete power on !
                by lapfix
                First the lap come witth a short to GND , it was a faulty capacitator : PC716

                After desoldered , the lap works fine...but after some tries not power on.

                Power supply reach 0.159amp for 1 minute than off...no short to GND at all coils .

                All the voltages at PM TABLE are finded , try another bios same behaviour !
                PS id is oK ; i try with an original charger same behaviour too...
                PQ700 a P-channel is ok , but his gate is not correct..0.001v...
                Pin 5/8 = 19v
                Pin1/3 = 19 v
                Pin 4 = 0.001v...not correct.

                Pu 800 =
                Pin...
                07-29-2024, 06:05 AM
              • shelby5041
                Proscan 40LD45Q messed up and no image
                by shelby5041
                hi

                tv powers on fine to a blue screen

                when OSD is hit the menu shows up ok sometimes for a few seconds and then just slowly fades away..if i click a diff menu option the refresh is lagging big time from option to option...

                backlights are fine

                this is one of those funky issues that im not sure what would be the cause..maybe bad lcd panel bonded tabs?
                09-22-2020, 03:18 PM
              • Loading...
              • No more items.
              Working...