 Posted: Sun Apr 20, 2014 9:16 pm Post subject: |
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| ACK do you know which diode it was , have same problem | |
| Posted: Wed May 15, 2013 11:59 am Post subject: |
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Sorry... i forgot about this post it was a faulty diode (open or short, can't remember...) near a voltage converter chip (3.3v i think) |
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| Posted: Wed May 15, 2013 11:42 am Post subject: |
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| joao2004 I am waiting detail | |
| Posted: Wed Feb 22, 2012 4:27 pm Post subject: |
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| Problem Solved... it was a fault at TCON board later will post some details. |
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| Posted: Wed Feb 22, 2012 12:15 am Post subject: |
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| I was unable to get mtktool to communicate with the tv... but i tried to update firmware thru usb flash drive and i think it updated (after ~2min tv shut down) but still the same... i checked that audio works fine... checking voltages, there is something strange with the +33v (to tuner). At power up there is 33v, but after ~5 sec it goes down to ~13v. if i keep changing channel it varies between ~12v to ~23v. Also B9v seems to have some ripple (~0.4Vpp) I maybe try to replace the TCON board... |
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| Posted: Tue Feb 21, 2012 10:27 am Post subject: |
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Thank's for the tip...i will try that There's no OSD at all !!! |
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| Posted: Tue Feb 21, 2012 12:47 am Post subject: |
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| Can also be due to firmware flash gone wrong. Do you have on-screen display at all, like channel number, etc? Sounds like the problem described here (LED flashing 5 times): http://www.avforums.com/forums/lcd-led-lcd-tvs/1087844-samsung-series-6-bad-flash-req-rome-flash-downloader-v4-x.html See if you can download the correct BIN file and re-flash the firmware using the software linked to at the above website. Good luck. Let us know if you get it fixed. |
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| Posted: Tue Feb 21, 2012 12:20 am Post subject: |
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| I can't find a fault listed the same as you're describing. The only one similar refers to the screen going black after a while, and the advice is to resolder joints on PSU. Generally capacitors in the PSU seem to cause a variety of symptoms too. Check all cables are making good contact too. E-mail me at: "james q b 2001 at yahoo dot co dot uk" (remove spaces and replace words - dot, at - with corresponding symbols as required) if you want the service manual for this set. You'll be able to check voltages are correct, etc., then, as well as further fault finding. |
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| Posted: Sun Feb 19, 2012 4:18 pm Post subject: [SOLVED] LCD samsung LE40A656 - no picture, no osd |
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| Hi, i have an lcd tv samsung LE40A656 with the following fault: tv turns on ok, but no picture, no OSD ! back-light is working and psu is ok red led blinks 5 times at switch on tv is about 3/4 year old but it only has a few hours of service. any help? |
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