Done a fair bit of searching on this so apologies if it's been covered before.
My GW-9200 has recently developed an issue. All appeared to be working well. Left the watch in a drawer for a few weeks. Took it from the drawer. Charge indicated 'H'. Try the EL, goes to recover (HML flashing). After a few minutes recovers to H. Try the Baro or altimeter, same happens.
Have left it in the sun for a few days (and it's quite sunny here in the UK at the moment). Still does the same. A couple of times it has managed baro readings in the red eye but when you select baro mode back to HML flashing.
Guessing it's a dud. Sadly bought used so I guess that maybe the end of it. Is it worth trying a new battery? Is a repair from Casio UK likely to be economical vs cost of a new Riseman?