Vestel 17mb61-2 I screwed up my TV

[oldschoolgamer]

Re: Vestel 17mb61-2 I screwed up my TV

Found the pinouts so now I just need a programmer of some sort to fix these.

[diif]

Re: Vestel 17mb61-2 I screwed up my TV

Found the pinouts so now I just need a programmer of some sort to fix these.

A CH341A is less than a fiver. Get one with the PCB to solder the spi flash chip too.

[tom66]

Re: Vestel 17mb61-2 I screwed up my TV

It's an I2C programmer for programming the likes of bios chips I need right? This is only for experimenting anyway now as I ordered a new board but I might get some money back by selling these on cheap if I get them booting or even just keep them as spare just in case.

I'll look for the schematics anyhow.

SPI programmer. Not I2C.

[oldschoolgamer]

Re: Vestel 17mb61-2 I screwed up my TV

Yeah I got mixed up but I got the right one ordered anyway a CH341A. I've nothing to lose as them 2 boards are already broken but it'll be a bonus and learning experience to fix them. Also it'll give me the option to play around a bit more and see if I can mess with the files to change the colour temp again which is what this started over. Basically cool is still yellowish.

As long as I have one that works I can play around with the others.

Also I did get the programmer you solder the chip onto but I'm gonna need a better soldering iron or station to do it I think. The pins aren't as small as I originally thought so it shouldn't be too hard especially if I get some braid.

[vinceroger69]

Re: Vestel 17mb61-2 I screwed up my TV

hot air station on these ics help as well with the removal etc and good flux etc and decent braid as you dont want too lift any traces if it get stuck too the pads

[diif]

Re: Vestel 17mb61-2 I screwed up my TV

Yes, I always remove with hot air. Soldering iron to reattach.

[oldschoolgamer]

Re: Vestel 17mb61-2 I screwed up my TV

hot air station on these ics help as well with the removal etc and good flux etc and decent braid as you dont want too lift any traces if it get stuck too the pads

Yes, I always remove with hot air. Soldering iron to reattach.

Thanks for all the info. It'll be Monday or Tuesday by the time I get the programmer and like I said, I've nothing to lose. I already ordered another working board but I might aswell experiment for if this ever happens in the future with another TV.

[vinceroger69]

Re: Vestel 17mb61-2 I screwed up my TV

the hardest part as you have found is finding the firmware too match the lcd panel used but as you have the old files you have saved hopefully you can make it work if you search this forum for the CH341A there is some software for that too

[Peter Simpson]

Re: Vestel 17mb61-2 I screwed up my TV

Thanks for all the info. It'll be Monday or Tuesday by the time I get the programmer and like I said, I've nothing to lose. I already ordered another working board but I might aswell experiment for if this ever happens in the future with another TV.

Use the programmer to read the EEPROM from your new board, save the file and then save it onto your old board. If it works you will be very happy chappy inideed.

I use one of these
https://www.aliexpress.com/item/Free...311.0.0.deJUCh

In conjunction with one of these
https://www.aliexpress.com/item/CH34...311.0.0.deJUCh

[oldschoolgamer]

Re: Vestel 17mb61-2 I screwed up my TV

I'm hoping the new board will just work when I get it and I do have a few 1mb flash files downloaded for the SPI chips. The old boards will either do me as spares or someone else then if they need one.

Can them NVRAM files I backed up actually be used to put one of the boards back to the original state?

I had tried restoring the NVRAM but it didn't seem to be fixing it last time unless it's the mboot itself that has to be the correct one.

[oldschoolgamer]

Re: Vestel 17mb61-2 I screwed up my TV

I have the CH341A programmer but when I try to use it it just says write timeout. I have it with the jumper in the default position but I'm not sure if that's EEPROM mode or I2C as it does both. Maybe it's set to the wrong one I'm not entirely sure

[oldschoolgamer]

Re: Vestel 17mb61-2 I screwed up my TV

OK I got it to program and tried multiple mboot.bin files and 1mb flash files for the chassis but I only get a flashing red light on the TV and can't get it to read firmware from a USB to program it.

[oldschoolgamer]

Re: Vestel 17mb61-2 I screwed up my TV

OK so the latest update is I got the TV back to life after programming an mboot.bin but I'm still in the same boat with the firmware. The closest to working one I can find is from a Sharp LC-40LE530 but it has an upside down screen and there's another from a 42 inch TV that has an LG panel but it's showing 4 HDMI ports and the screen just goes off if the backlight is turned down. I don't mind that because I'll personally use maximum backlight anyway but only one of them HDMI channels work and without sound. Also the colour temp doesn't work on that one. It works on the Sharp firmware but the screen it just upside down.

I tried squashfs tools for windows but it says that the files are not squashfs when I try to extract it. I assume it's the mb61_en.bin I want to extract.

[tom66]

Re: Vestel 17mb61-2 I screwed up my TV

Can you send me the mb61_en.bin and I'll try unpacking it.
(PM me a dropbox link or something.)

[oldschoolgamer]

Re: Vestel 17mb61-2 I screwed up my TV

OK I actually got that board from the one with a 42 inch lg panel and it's working. I still have the yellow or greenish tint but at least the tv works. I can calibrate the colours for vga, ypbpr and ext1 but it doesn't let you change the hdmi or tv from the tuners colour gain. I had a newer vestel before and it had the option advanced settings in picture but this seems a lot more limited. If it would let me change the rgb gain on hdmi that would be perfect as that's what I use to watch my Virgin Media Horizon box. Well at least the tv works.

[tom66]

Re: Vestel 17mb61-2 I screwed up my TV

I will have to have a look when I get back from London on Sunday/Monday.

[oldschoolgamer]

Re: Vestel 17mb61-2 I screwed up my TV

I will have to have a look when I get back from London on Sunday/Monday.

Thanks. The TV is perfect otherwise now except white looks like a milky colour or vanilla and grey has the greenish colour too. It seems like it's just short on blue as the sky colour or cyan has that tinge to it also.

I can backup the firmware from this if needed since it does work though.

[oldschoolgamer]

Re: Vestel 17mb61-2 I screwed up my TV

There's one more thing I was wondering about. These 1,024kb SPI files, are these just mboot files? I noticed they all contain panel information along with the downloads but doesn't the firmware also have to match the panel to work? I'm nearly sure different mboot files never made a difference to the panel and only the mb61_en.bin file seems to make a difference.

Reason I'm asking is because even though my TV works (with a yellow tint) I might aswell fix the other 2 boards I have and after weeks of searching I have obtained a 1,024kb flash file for 17mb61-2 that contains the correct panel information of LC370WUN. I'm wondering if I go through the effort of flashing the chip with this bin file will it even work and could I just rename it to mboot.bin and flash it with a USB stick using usb_auto_update.txt even though the mboot is slightly smaller file than the SPI flash file?

I also have linux on my laptop to try extract the files if I can manage.

[tom66]

Re: Vestel 17mb61-2 I screwed up my TV

mboot does not store panel info.

It is only the bootloader. It is what loads the kernel from the main NAND into DDR and executes it. Mboot will contain the bare minimum to bootstrap the CPU so that Linux can start running. I believe it also controls the power LED and some basic hardware, though I may be incorrect.

[oldschoolgamer]

Re: Vestel 17mb61-2 I screwed up my TV

mboot does not store panel info.

It is only the bootloader. It is what loads the kernel from the main NAND into DDR and executes it. Mboot will contain the bare minimum to bootstrap the CPU so that Linux can start running. I believe it also controls the power LED and some basic hardware, though I may be incorrect.

I think you're right about the power led anyway because it wouldn't even work when I deleted the mboot accidentally. Yeah I was wondering why people have panel info on the spi files which are easy enough to find but it's impossible to find the actual firmware. I'd like to actually get into the firmware main files and find out if the blue gain can be turned up possibly or the green and red down instead. I know it's hassle but it's just annoying that it's so yellow. You stop noticing then I look at my phone or PC screen and look back and it looks extremely yellow again.