On Thursday, 20 May 2021 at 19:57:20 UTC+1, wrote:
Am trying to get back into flying with a glider which had a Compaq Aero 1500. Would like to fly before making any changes to instruments. Somehow this PDA doesn't want to wake up any more. Does anybody still have one of these archaic PDAs lying around, and in working order?

Thomas

No need to make any changes to the instruments - just run XCSoar on an Android phone. Fully standalone except for a booster battery it will work fine.