OSTC3 unable to turn on after dive

[KEngelstoft]

Hi! My OSTC3 is unable to turn on after a dive, even with a brand new SAFT battery installed. It starts fine after having been on the surface for about a day. I have not found moisture inside the battery or USB compartment. When in unresponsive state, I can't get a USB connection to work either, just black screen. Firmware 0.97, but also happened on version 0.95.
Taking it diving while in this state, it will start when submerged... Sometimes at 1.5 meters but I have also seen it start at 10 meters.

Today, I compared the depth reading with an OSTC2 and there was a difference:
OSTC3: 10.4 meters
OSTC2: 10.0 meters

I have logged 14 dives with this computer.

[KEngelstoft]

Update: The computer has been unable to turn on for more than 3 days now (on the surface). I tried replacing the battery with another brand new SAFT battery and the display came on with the 'New battery' menu.
I selected 3,6 volt and then the screen went black again. I have been unable to turn it on again.
I will take it diving today to see if it turns on when submerged. I am glad I have a backup computer...

[KEngelstoft]

I did an hour long dive yesterday and 2 more dives today, maximum depth 11 and 17 meters, total duration 48 minutes. The computer did not turn on at all and does not react to key presses I believe it is time to send it back to HW.