HAIER HLH26BB Troubleshooting

[Shane711]

OK, so I this HAIER HLH26BB and the screen flashes. Turns on but the screen just keeps flashing. Also I can't seem to turn the volume down, could be a bad button.

Upon opening there is no visible bad parts. So then I tare it apart to inspect the inverter boards and no bad caps on those either. I now suspect the lamps and I will be checking those in the next few days.

[CapLeaker]

Re: HAIER HLH26BB Troubleshooting

what flashes? The backlight? Check the output voltages on the PSU and the backlight if they are good and stable. Resolder the transformers, check cables and connections, cold solder joints etc on the inverter.

[Shane711]

Re: HAIER HLH26BB Troubleshooting

Yes, backlights are flashing. The lamps look perfect, no dark spots and they all light up equally. So I think I narrowed it down to 2 possibilities. Either 1 of the inverter boards or the power supply. Most likely the power supply because I see someone has changed a few caps on it. The Power Board is labeled 5VDC, 12VDC, & 24VDC but I am getting like 4VDC, 10VDC, & 22VDC. My 12VDC starts out at 12VDC and then drops down to 10VDC before the backlights turn on. So my next step is to test all the caps on the Power Board.

[Shane711]

Re: HAIER HLH26BB Troubleshooting

OK, I just fixed it. Of course I forgot to say I did not find any bad solder connections.

I found C52 & C84 to be bad. They are 100uf 25V and I replaced them with 100uf 50v because that is what I had. The 2 caps were reading 68uf and 15 ohm ESR.

So I put the TV back together and the backlights are no longer flashing. But I now my buttons don't work. I can turn the TV on and off just fine but all the other buttons are wacky. Maybe a bad resistor on the button board. I think I will try to test it with a universal remote first.