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OK. You have a bigger problem first.

If you can´t connect to AQ you´d try to start again by installing a new fw. You must can doing that. If not possible, maybe the board is bad or your FDTI cable is wrong or broken.

The solution I´ve shown above about DIMU red light "bypass" the problem, but at the end you can instal the DIMU deffault params and fly (with a little more of effort, but it works)

Angel

Thanks. I can still revert to the old firmware and everything works fine. This rules out a cable issue. Also, when I put in a different DIMU board it works fine (still have to put in the SD card with params file, but no debug light issue).

If anyone knows of something else I can try to figure out where the problem is originating I would love to hear it.

Cheers,
Richard

With FWr381hw6.1 The AQ was stuck on red light. Then I put the parameter file given by jussi in the sd card and then tried. Now it is stuck with 2 red lights. Logging is being done but no information is written in the file. I can't connect AQ to QGC.

I think there is something wrong with these board some bad soldering or some other components issue.

Jussi please advice

I have not seen this problem before. If you suspect HW failure, then I need you to send the board back here for examination.

But first, try and load a standard FW for AIMU and confirm you have connection then. The reload DIMU FW and try again.

All the ready made boards was thoroughly tested. As were the DIMUs....but of course they could have failed in transit.

The red Debug light usually when you perform the tare. Im not sure if it also begins flashing at battery stage 2, but I think it does...Bill?

I have not had a DIMU that did not initialize without the DIMU parameters. We probably need to publish FWs with default DIMU params...will ask the devos to look into it.

The 2nd red LED stays on when there is a PARAMS.txt file on the SD card. I'd double-check the text file (actually plain text and such), to avoid the same problem Larry was having last night.

-Max

So here is the resolution(or atleast a step forward)

The problem is poor soldering on the lower side as shown below on IMU, Magneto and baro

Adding a little bit of solder paste and Heat and got following results after cleaning

So now I can move forward and AQ boots when PARAMS.txt file is placed in SD Card.

If all leds are flashing, you are triggering a compass calibration... Verify that your TX channels are set correctly. If you pull both stick to lower left and all leds begin flashing, then your elevator channel is probably reversed.

Yeah, thats some crappy soldering for sure - dunno how that passed QC, but I will tell factory to pay more attention Thanks for cleaning it up yourself.