Hi,

I have several issue comes from a customer who run MD4/MC31 multimaster system.

They have MD4 who are not anymore able to keep the RTC.

To be sure, I took a kit apart and tested it myself. Finally, I move the MD4 alone and tried it with a very small program. Only value to show date/time/temp.

When it boot, the RTC is resetted and the temperature is OK (around 40 Celsius).

But when I update the date/time from iQanRun, the date and time appear to be OK, but the internal temp goes to -1C and give critical error.

I did a short video to show what I did and to show what's append.

https://youtu.be/npQr-87-FiY

Thanks!

There is some picture to complete:

I am using an MD4-7 screen on a test bench. 3 out of 4 starts I get either a White Screen or a black screens with some colored dots. Once I saw what seemed to be blocks of black and white.

Looks like the video driver is not starting properly. The application appear to be running since the canbus messages are being generated.

Can this be caused by the regulated switching power supply during start-up or do I have a defective MD4 screen?

Thanks for your inputs.

How long does a static image need to remain displayed on an MD4-7 screen before image burn-in is noticeable?

Assume worst case. (Worst case being probably full brightness with high contrast graphics??)

What is the recommended time-out for when a screensaver should start? Would just dimming it for the screensaver avoid burn-in? How much should it be dimmed?

The MD4 instruction book (rev 2015-12-02) says:

Burn-in

The IQAN-MD4 TFT display, like other computer screens can have a ghost picture

occur if a static image is left on the display for extended periods of time. For the best

viewing over the life of the product we recommend using the screensaver functionality.

NOTICE

Hi everyone,

We want to adding a new feature on MD4 controller. When the system locked function is true, standby mode should be active because of energy-saving.

Best regards.

We are using an MD3 and MD4 as screen on our system.
They print the same info from one CAN BUS

They are on the same system than a generator quite noisy, and when the generator start we loose the touch on the MD4, only the touch.

• The screen still work good
• the Md3 act normal

Did any body experiment the same kind of issue?

I don't have a scope on site I am investigating right now on the issue. I will try to
Power supply the MD4 from an other power source
Isolate the power suply if it doesn't work
I will try to add a capasitor if I have time.