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Crumbtrail TV Forums: TV Equipment: TV Repair Forum:
Hannspree HF259H no image

 

 


lz300
New User

Feb 17, 2018, 7:21 AM

Post #1 of 7 (949 views)
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Hannspree HF259H no image Can't Post

With HDMI plugged in, I get the backlight to come on the screen, but no image at all. if I shut down the source, the monitor blacks out and the power light goes orange (as usual). I do not get anything on screen, even when pushing the menu buttons on the side of the monitor.

I have looked at the boards, and see no obvious evidence of burnout... no black marks, no bulging or discolored capacitors, no burnt smell. I have replaced the signal/driver board (PM549DA3 M06 ver6.0), still not working. Before I try ordering and replacing the other boards, I am hoping someone can help me narrow down or isolate the problem.



jts1957
Veteran


Feb 17, 2018, 11:31 AM

Post #2 of 7 (944 views)
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Re: [lz300] Hannspree HF259H no image [In reply to] Can't Post

Tcon board is next.


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Location: Far, Far Away


lz300
New User

Feb 17, 2018, 3:26 PM

Post #3 of 7 (934 views)
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Re: [jts1957] Hannspree HF259H no image [In reply to] Can't Post

Tcon board is ordered. I'll update when it comes in


lz300
New User

Mar 4, 2018, 4:29 AM

Post #4 of 7 (884 views)
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Re: [lz300] Hannspree HF259H no image [In reply to] Can't Post

Replaced the Tcon board, still not working.

Am I missing something obvious ?


lz300
New User

Mar 4, 2018, 6:25 AM

Post #5 of 7 (877 views)
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Re: [lz300] Hannspree HF259H no image [In reply to] Can't Post

After some researching, I checked for voltage at the input of the Tcon board, I am getting some readings, around 1.2-1.4 volts on some pins. The main CPU on the board is warm to the touch. I checked voltage on the pins of the two ribbons leading to the LCD display, I am also getting some voltage there.

If I understand correctly, that means the Tcon board is functioning correctly, and I am most likely looking at a bad LCD display.

Can anyone confirm this for me ?


jts1957
Veteran


Mar 4, 2018, 9:57 AM

Post #6 of 7 (868 views)
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Re: [lz300] Hannspree HF259H no image [In reply to] Can't Post

F300 on Tcon has B-Plus? Probably, as Scaler IC (U303) is heating up.

Does set have sound?

IF NO sound, then Main board, or possibly a power supply B-Plus source is missing.


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Location: Far, Far Away

(This post was edited by jts1957 on Mar 4, 2018, 10:09 AM)


lz300
New User

Mar 4, 2018, 10:40 AM

Post #7 of 7 (863 views)
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Re: [jts1957] Hannspree HF259H no image [In reply to] Can't Post

It does have sound.

 
 
 


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