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Widescreen Brightness

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It’s the memory in the nav computer becoming corrupted. It’ll eventually start forgetting last destinations and the address book. Siemens VDO in Germany can repair it.

 

they did mine a couple of years ago and it’s been working perfectly since. At around £80 it’s much cheaper and quicker than mucking about with the ibus etc

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39 minutes ago, velvetmonkey said:

It’s the memory in the nav computer becoming corrupted. It’ll eventually start forgetting last destinations and the address book. Siemens VDO in Germany can repair it.

 

they did mine a couple of years ago and it’s been working perfectly since. At around £80 it’s much cheaper and quicker than mucking about with the ibus etc

So it didn't retain the brightness setting previously, but now it permanently retains it?

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8 hours ago, chalky said:

Yeah pretty much same situation as me then.  Is yours a retro-fit screen like mine?  Do you reckon anyone out there has a car that retains the brightness setting, let’s say overnight?  I’m thinking about building a cheap wee microcontroller circuit to inject the max brightness message onto the iBus. 

My screen is original but the MkIV is a retrofit.  I tried swapping the MkIV over from my E46 M3 but the problem stayed with the car.  I do have an Intravee though.. I wonder if Richard could add an option in the Intravee to override the brightness setting.

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When changing the brightness slider in the Settings menu, the Nav sends the following messages

 

3B 06 F0 05 41 01 bb cs

3B 06 F0 05 42 01 bb cs

 

Where bb is the brightness and cs is the message checksum.

 

So, try sending these using the 'is' command, they should set about 72% brightness.

 

is 3B 06 F0 05 41 01 48 C0

is 3B 06 F0 05 42 01 48 C3

 

If those work, the Intravee could set the brightness directly, or maybe use one of the light sensor values to adjust it automatically.  There may be some extra checking to re-set the brightness whenever the Nav tries to set it, that might cause the monitor to flicker.

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12 hours ago, chalky said:

So it didn't retain the brightness setting previously, but now it permanently retains it?

 

It wasn’t retaining anything before, not even the position of the car before turning it off. Now it’s fine

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13 hours ago, velvetmonkey said:

It’s the memory in the nav computer becoming corrupted. It’ll eventually start forgetting last destinations and the address book. 

If that's the case, why did I still have the problem when I put a known good MkIV in my M5?

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8 hours ago, BarryM said:

My screen works fine but I did see you can replace the LCD for <£100 so that might be an option.

Yeah I tried that, didn’t make any different to the poor brightness I have.  Others might have different experiences if different cause. 

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On 12/21/2017 at 9:05 AM, RichardP said:

When changing the brightness slider in the Settings menu, the Nav sends the following messages

 

3B 06 F0 05 41 01 bb cs

3B 06 F0 05 42 01 bb cs

 

Where bb is the brightness and cs is the message checksum.

 

So, try sending these using the 'is' command, they should set about 72% brightness.

 

is 3B 06 F0 05 41 01 48 C0

is 3B 06 F0 05 42 01 48 C3

 

If those work, the Intravee could set the brightness directly, or maybe use one of the light sensor values to adjust it automatically.  There may be some extra checking to re-set the brightness whenever the Nav tries to set it, that might cause the monitor to flicker.

Would this be done by plugging a computer into the Intravee via the serial port and using the Intravee downloader program?  I have to admit I am not fully up to speed on all of the capabilities of the Intravee (there are so many!), but I found the section in the User Guide about setting the UI mode with a PC and figured this might be a similar process?

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Yes.  Connect up your PC and run the downloader program as if you were going to update the firmware, then type those commands into the console part of the downloader (the large white area below the menu).  You can also use cut and paste, but DON'T use 'Ctrl+V' to paste, right click and select Paste.  Complete the command by pressing the 'Return' or 'Enter' key.

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7 hours ago, RichardP said:

Yes.  Connect up your PC and run the downloader program as if you were going to update the firmware, then type those commands into the console part of the downloader (the large white area below the menu).  You can also use cut and paste, but DON'T use 'Ctrl+V' to paste, right click and select Paste.  Complete the command by pressing the 'Return' or 'Enter' key.

Both of those commands increased the brightness.  I wasn't sure if I was supposed to enter them both at once or individually, so I just entered one at a time, resetting the brightness with the knob on the monitor in between.

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OK, so it's possible to set the monitor brightness.

 

There are a couple of possible issues, for example what happens when the lights are turned on, does the monitor still respect the dimmer control?  In my various iBus logs I can't see any instance of these messages being sent from the Nav to the monitor on initialisation, so either some other mechanism is used or the monitor is supposed to remember the brightness itself.

 

I would propose that the Intravee could grab the set dimmer value from the brightness messages sent when the slider is changed, then send that value at some point during the initialisation process, probably shortly after the monitor announces itself on the iBus after power up, but it may need to be later than that, maybe ignition on.

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3 hours ago, RichardP said:

OK, so it's possible to set the monitor brightness.

 

There are a couple of possible issues, for example what happens when the lights are turned on, does the monitor still respect the dimmer control?  In my various iBus logs I can't see any instance of these messages being sent from the Nav to the monitor on initialisation, so either some other mechanism is used or the monitor is supposed to remember the brightness itself.

 

I would propose that the Intravee could grab the set dimmer value from the brightness messages sent when the slider is changed, then send that value at some point during the initialisation process, probably shortly after the monitor announces itself on the iBus after power up, but it may need to be later than that, maybe ignition on.

I get the feeling the monitor is supposed to remember the brightness itself, but I could be wrong.  It seems a last resort to have to have the Intravee set the brightness level, but if it's simple enough to add it as an option in the light control menu (or wherever you see fit), that would be great.  

 

I did notice that once I sent a command over the iBus and the monitor brightened, the dimmer control slider still indicated that it was at half brightness (which is what it keeps resetting to currently), but once I adjusted the slider the brightness dropped to that setting.  In other words, the command sent over the iBus bumped it up to 72%, but the slider still showed 50%.  Adjusting it one notch to say 55% and the brightness dropped straight from 72% to 55%.  

 

I should mention that I tried those commands with the parking/headlights off.  I'm not sure if turning the headlights on/off after sending the command to increase the brightness will make it revert back to the slider indicated setting.  Or if forcing the light sensor to adjust (by shining a light into it) will also make it revert back.  I can try those later and see what it does.

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Just to follow up on this, I ended up sending my monitor to Hi-Tech Electronic Services in California for repair.  They were not able to duplicate the brightness issue on the bench but did note that the screen opened and closed a few times randomly.  They couldn't pinpoint the issue so they offered to replace it with a refurbished unit and an extended warranty (1 year instead of 6 months for a repaired unit).  Cosmetically, the new unit looks about the same as my old one (minimal wear on buttons, etc.) but the brightness issue no longer exists.  Only thing was the viewing angle seemed... off.  After looking into it, I discovered that this is actually adjustable since the same monitor is used in the E39, E38, and X5 (E53).  Rather than send it back, I found a procedure for adjusting the viewing angle and confirmed with Hi-Tech Serv. that I wouldn't be voiding my warranty by doing this.  It looks a bit daunting but it really wasn't that bad, just a little tedious adjusting all the different screws to see what effect each one has.  This is the procedure I followed.

 

http://www.m5board.com/vbulletin/e39-m5-e52-z8-discussion/97271-adjusting-viewing-angle-nav-screen.html
Adjusting 16x9 BoardMonitor (Very Long)

 

So, overall a positive experience with Hi-Tech Electronic Services.  A little disappointing that they couldn't repair my original unit, but nice of them to source a good condition replacement unit and give it a once over and an extended warranty.  I would have liked for them to have set the viewing angle before sending it back but at least they allowed me to do it myself without voiding the warranty.

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On ‎23‎/‎12‎/‎2017 at 10:46 AM, BarryM said:

My screen works fine but I did see you can replace the LCD for <£100 so that might be an option.

 

don't suppose you'd have any links for the LCD panel? mine is growing a line of dead pixels :(

 

Thanks!

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Additionally, there is a brightness and contrast setting in the TV menu (if you have the BMW video unit) - this has made a MASSIVE difference to rear-view camera image for me.  And it is remembered.

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6 hours ago, lufbramatt said:

 

don't suppose you'd have any links for the LCD panel? mine is growing a line of dead pixels :(

 

Thanks!

 

This is the one I'm looking at: https://www.ebay.co.uk/itm/6-5-Sharp-LQ065T9BR54U-TFT-LCD-Display-Panel-For-BMW-E39-E46-series-1999-2005/352159112089?ssPageName=STRK%3AMEBIDX%3AIT&_trksid=p2055119.m1438.l2649

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4 hours ago, BarryM said:

Don’t buy a ...BR54U, for a sedan/saloon they are for E53.  I did, big mistake.  LCD viewing angle is different.  Not adjustable.  It’s not pixel-shift, it’s LCD specifications.  I think you want a BR52 for a sedan, but you need to confirm that somewhere, there are various parts and differences to be aware of. 

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OK, sorry if I’ve given the wrong info. There’s a thread on how to adjust the viewing angle of the screen but obviously best to get the right one to start with.

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My screen seems to be deteriorating so I think the LCD is knackered, I’m going to order one of the Sharp LCDs off eBay. Will update when replaced.

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Hi Barry,

 

There's been some threads recently on the M3cutters forum about replacement TFT screens. I think most were purchased from this place - http://www.fiesta-tech.co.uk/dashboard-display/BMW LCD

 

No affiliation for me but it's a pity the site doesn't have a geographical address and phone number - unless I've missed it!  

 

I've taken apart and rebuilt a number of E39 monitors, and although some say it's 'easyish', I'd still say it's 'quite tedious' at best - get one bit wrong and it possibly means a lot of disassembly again before identifying what the issue is and then rebuilding again. I think the first time took me around 4/5 hours to do with multiple repeats of assembling/disassembling !  

 

Cheers, Dennis!

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Hi Dennis,

 

Appreciate that link, unfortunately I posted and immediately clicked the purchase through eBay :(

 

There's a very thorough DIY on one of the Bimmer forums I'll be following, not totally convinced this will cure the low brightness but I think the LCD is shot so it needs to be replaced. I will persevere with my setup as it works well enough for me. The only alternative is to go the NBT route but that will be a last resort given the effort I've put into my current system.

 

Barry 

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Hi Barry, 

 

No problem, it'll help others who may see this thread via search results. In case the one you get is faulty and you return it etc, then you can look at the Fiesta tech place. 

 

Some years ago, I followed that very good and thorough guide and I think I've posted the link to it previously on here. I guess after dismantling and rebuilding maybe 4/5 units you do begin to get the hang of it, it's just SO easy to miss a step and it knocks every other step out! plenty of times I thought I got it and found I couldn't get the case to fit properly, I had to dismantle perhaps 40% of it to find the little bit I missed, fix it and then reassemble again! Hopefully, you'll get it done without all that !

 

As I've mentioned in other threads, keeping the OEM setup working and maintained costs the most longer term. The TFT screen is one of the more pricier elements to resolve. I know many, like yourself, will only go with OEM, which is fine. The NBT route is perhaps the most expensive of all ! the big thread over on bimmerforums, there's now a few mentions of the modules there going faulty so another used/2nd hand part needs to be found and swapped in. As these get older, yep, they're going to fail more often and given they're more specialist electronics, it seems there's very few places able to refurbish/fix those .Maybe a specialist soon will come up with cheaper fixes/resolutions over the next few years!

 

Cheers, Dennis!

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UPDATE:  The problem is back with the new (used) monitor.  Same thing happened where I was driving along then randomly the monitor started flashing on and off, then the screen began folding open and closed repeatedly.  The brightness setting no longer is saved after shutting the car off and the "EEPROM Checksum does not match with programmed value" code is back when I scan the on-board monitor module (BMBT) with PA Soft.  Absolutely infuriating...

 

Could this be caused by a bad map disk?  Bad BM53 radio module?  Bad MkIV DVD drive?  Seeing as the exact same issue has happened with the refurb monitor, I suspect the issue is coming from somewhere else.  I can get another MkIV or BM53 but the only way to tell if the issue is fixed is to just use it for a while and see if the screen goes nuts again while driving.  That also won't fix the EEPROM error and brightness issue with the monitor, seeing as when I tried swapping in the MkIV from my M3 it did not cure the brightness resetting issue.

Would any of the options in PA Soft (Write EEPROM, Reprogramming, or Unit software restart) be worth trying?  I have not used these options before and do not know what I am getting into with those, so any assistance there would really be appreciated.

bmbt.PNG

reprogram-bmbt.PNG

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