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Thanks for that Matthias, I got it via Deep Ideas, so I'll give them a call first and see what they recommend.

Just as addition to last nights findings, the screen is still on, and the pseudo simulation is still running (currently at 797 minutes). No available options will stop it.

Hi Matthias,

I plugged in a USB cable in preparation for doing the magnet trick, and immediatly got a white screen, followed by an error message as shown in the first attached file.

It's now seems to have gone into a psuedo simulation routine as shown in the second attached file. In this mode, if ...

Thanks for that Matthais, I'll have to wait until I get home to try that, there are no magnets on board.

Is there any reason it may have done this ? Luckily all the diving on this trip is recreational so my backup Suunto has been sufficient, but I'm now worried it's going to happen again when I'm ...

Over in the Red Sea at the moment and my OSTC MKII appears to have died. It was fully charged before I came out, but on the fourth dive it wouldn't switch on.

The LED is flashing red three times with a 5 second gap between. I assume this indicates something, but with the very poor wifi connection I ...

Ah, great news, it's finally worked. The main problem was not knowing what "reset with a magnet" actually entailed. I've not had to do it before, and couldn't find any info on the exact steps.

What I was doing was holding the magnet under the unit until the orange light flashed, removed the magnet ...

Yep, tried all sorts, but the bootloader was not running.

I've just tried using my work laptop which is W7. The bootloader runs, but still no joy. W7 didn't automatically install drivers, so I downloaded them from FTDIChip.com. (v2.08.28)

This is the output from the log ...

Thanks for that. I've downloaded v1 of the bootloader, but it just seems to hang when I run it. There is an icon on the task bar (Win XP by the way) but no application running. Maybe it's waiting for the OSTC, but as I said. that's completly dead.

I've just tried to update my OSTC Mk2 from 2.5 to 2.7, but it failed within a few seconds of writing the flash,and now the unit is complelty dead.

This is what the bootloader has at the end of the log.

Connected to \\.\COM4 at 115200
HEX: 0 min old, INHX32,18Fcode+cfg, total=85599 bytes.
Searching ...

You'd be much better off using 5mm (3/8" ) surgical tubing as it's much more stretcy than bungee, but holds the computer firmly on your wrist.

I use it with drysuit/wetsuit/shortie without having to adjust the loop length. Goes over dryrings without a problem.