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Re: Vestel 17IPS71 + 17MB82S - no standby
Vestel is known to have major firmware issues. Try this. For the stick. I think you know the procedure.Comment
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Re: Vestel 17IPS71 + 17MB82S - no standby
thanks yokoono,
i have tried upgrader_loader_nvclean.pkg before.
i'm getting 5V at USB but no sign of stick reading.
turned the tv on with 'ok' button on the remote (I verified that IR signal is read)
is there another procedure before I start programming the two flashes?Comment
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Re: Vestel 17IPS71 + 17MB82S - no standby
If the bootloader has crashed, then only programming U10, U12 (only in a set) on the programmer.Comment
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Re: Vestel 17IPS71 + 17MB82S - no standby
Unzip firmware. Press and hold the ok key on the remote control. TV in socket. Release the ok key when the left LED flashes quickly. Try several times. Try another stick. If it doesn't work, you need to rewrite the flash memory (spi) with the programmer. You also need the panel code (VES ????????). Also check if the OK key on the remote control is functional. If you have copied software for another TV model that uses a different remote control, the ok key may not work.
You can also try this:Last edited by yokoono; 11-27-2021, 05:00 AM.Comment
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Re: Vestel 17IPS71 + 17MB82S - no standby
tried that a few times. no blinking led at all and no usb activity (the stick has a diode for activity, it never blinked).
I looked at the signal coming from the IR board, it has a nice square wave during remote button press.
panel is VES400UNDS-2D-N02.
gentlemen, I am worried that the signals on the flashes are so... non SPI
I hooked up my logic analyzer and it only registered single spikes in activity.
shouldn't I be seeing more?
also, why would uart lines be so finicky? it seems the capacitance of the mini probe's sonde is bringing them down to 0 immediately. I'm afraid the CPU is gone.Comment
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Re: Vestel 17IPS71 + 17MB82S - no standby
If the SPI kit firmware does not help (for diagnostics), then it remains that the processor has died or its reboll.Comment
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Re: Vestel 17IPS71 + 17MB82S - no standby
thanks yokoono,
a new development
I desoldered the two winbond chips and tried to program them - and could not.
they do not respond at all.
I noticed though, that the firmware dumps are for 25q64 & 25q16, while I have 25q64 & 25q32 versions. Does that matter? Are there 8/4mbyte versions of the firmware?
with the chips removed, the CLK signal on the mainboard now looks ok, so there is some hope ordered both 25q32 & 25q64. will keep you posted.
Last edited by cruiser_; 11-29-2021, 04:11 AM.Comment
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Re: Vestel 17IPS71 + 17MB82S - no standby
what programmer are you usingthanks yokoono,
a new development
I desoldered the two winbond chips and tried to program them - and could not.
they do not respond at all.
with the chips removed, the CLK signal on the mainboard now looks ok, so there is some hope ordered both 25q32 & 25q64. will keep you posted.Comment
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Re: Vestel 17IPS71 + 17MB82S - no standby
Arduino as ISP + flashrom & USBASP + AsProgrammer + MOSFET based level shifter.
waiting for CH341A to arrive too.
are these chips 'special' ?Comment
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Re: Vestel 17IPS71 + 17MB82S - no standby
So I got back to it today and was able to read original chips. Not sure why it did not work earlier... Anyway,
I compared the dumps with the files provided in this thread and they seem to follow the same format. Also, binwalk utility nicely identifies section in them.
Perhaps someone can make use of these.Last edited by cruiser_; 12-08-2021, 11:25 AM.Comment
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Re: Vestel 17IPS71 + 17MB82S - no standby
So i think it's time for the board replacement.
apart from matching the connector for the panel, is there anything else to look for in replacement boards? can I swap 82s with some other model?Comment
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Re: Vestel 17IPS71 + 17MB82S - no standby
i always try to match the number on the white sticker on the main board the one thats 23226476 ive never had a issue if i match a replacemt board that way hopefully lotas can explain fully what numbers actually matter.Comment
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Re: Vestel 17IPS71 + 17MB82S - no standby
If there were 25q64 and 25q32, then you need to look for a set of dumps for 25q64 and 25q32 and the panel number, try this set.Comment
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Re: Vestel 17IPS71 + 17MB82S - no standby
a small update...
I ended up getting two replacement 17MB82s boards. Thought of moving a CPU from one to mine, but didn't think it was worth the risk.
The replacement boards have no digital tuner and have 25q64 & 25q16 flashes, so I believe flashing my firmware to them is pointless?
Anyway, with both boards the TV turns on, backlight is on and the screen is on; it is just a bit skewed.
I presume this has to do with a different panel profile?
Is there one for VES400UNDS-2D-N02 that I can flash via USB?Comment
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Re: Vestel 17IPS71 + 17MB82S - no standby
What I did later... I extracted pcf.bin & ptf.bin from my firmware dump (binwalk + tar) , put them on the USB stick, started the TV, did USB operations and voilla!
The display is now working!
Thank you all for help!Comment
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Re: Vestel 17IPS71 + 17MB82S - no standby
Teşekürler .Thank youComment
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Dear friends,
i do have a VESTEL 17MB82S not working. Here is the story:
First, when i give power on tv, red led lights after some blinkings and i've noticed that picture apears but no backligt at all (i use a small light to see it).
Then i do flash with a FAT32 USB stick, the upgrade_loader.pkg file with the known OK button method. After that, the TV stops and when i press the ON-OFF button from remote control, the red led goes on but no backlight no picture at all.
I do took off the 2 flash IC's U10,U12 try to read them with flash programmer, but i get "Error... -
Hello!
Bought a used TV last weekend and everything was fine when I tested it. Back home I tried to connect it with my PC via HDMI. I noticed that the picture didn't quite fit in the TV's picture and so I tried to change the output resolution on my PC and then changed the picture formats on the TV. I still didn't get the picture right and stopped to google the problem and then it happened - the TV died on me after I got to use it for 30min.
JVC LT65VU83K Serial nr. 7975101 800044
Panel: VESTEL VES650QNTS-2D-U11 Manufactured 18/04 23443739
Power board: VESTEL...08-31-2021, 05:47 PM -
Hello,
I need advice in troubleshooting Telefunken TV (it is actually Vestel). There is red Standby light but TV cannot be turned on either by remote control (which is good and tested on another TV) or by actual on/off switch at the back of the TV.
Power board is Vestel 17IPS71 and I'm not sure about the mainboard, it seems like 17MB82S
Both boards are shown in the attached photos.
What is normally first that is checked in this case. I have removed power board, make sure it has no dangerous voltage on the big caps and check many components (transistors and diodes)... -
Hello guys,
I have 32 inch Hitachi TV with Vestel PSU board 17IPS71. Tv was working normally and I shut it down normally via remote control.
The next morning it couldn't turn ON neither with remote controller or via button on the logic board.
There is a red standby LED ON, so it is not dead totally.
I have examined the PSU board and I cannot find find any traces of blown components or bulged caps. Electrolytic caps are manufactured by Elite.
I also check diodes and big MOSFET (with cooler/heatsink). It seems OK.
Can you tell me based on... -
This is my first attempt at troubleshooting a board like this, I know I could just buy a new board but I'm curious to figure out how this works. I've been testing different components in the evenings this week and I think the problem is with the IC failing to start up for some reason. When the board is plugged in there is no standby voltage.
Then today it randomly sprung to life like a zombie but shortly died thereafter. I have no idea why it would have done that and its the first time I've seen it running. I discharged capacitors on the board last night, then it was sitting today....
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