Suunto Core Regular technical question

[gjopp]

Hi,

I bought a second hand Suunto Core Regular which actually works and functions pretty good. When i first started to use it I noticed the altimeter was still working. Now after a couple of days and playing with Sea level Reference value (setting it to 1015 hPa) it stopped being able to set Altimeter reference data (i See a Dash and can not change the value) and does not display temperature (keeps stuck on 0 Degrees). Does anyone here know whether this is because the sensors are malfunctioning or is there a way to delete the sea level reference value and reset the suunto core regular to defaults? I already tried soft reset, Removing battery for a week, setting new values and changing metrics, but no luck just yet.

Thanks in advance!!!

GJOpp