My samsung digimax s800 won't turn on,the batterys are ok

This explains the 3 beeps. also says you can get it repaired which is by far the best option. The behaviour is very typical of low battery state. Try a set of Lithium batteries.

https://www.samsung.com/in/support/cameras/why-camera-goes-off-after-3-beeps/

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It needs either service or repair

this problem is a is usual occurrence when the camera is not well powered.
ie. the battery might not have enough charge on it or might have gone bad and require you to replacei it.

please ensure you get the battery with right voltage and wattage, the required is usually written around or in the battery compartment.

check first if battery is ok, maybe your problem is your barrel, if barrel not function properly you need to change motor or barrel allignment. if barrel is ok you have short circuit in your assy pcb main.

i had the same problem with my samsung s800 camera (from new!!!) draining batteries quickly and then being left with the lense out, i took the camera back to where i got it from (argos) and after being asked if i was sure i was putting charged batteries in they sent it away for repair and it turned out that the lense mechanism was broken, i think they charged me £10 to get it fixed but i have had no problems since then.

Sounds like your lens is stuck. Try a gentle tug and it should open all the way. Then you can power your camera down.

called samsung s800 have know power problems return for replacement before warranty expires or they will charge you 58 to fix

A temporary fix to power up is to press the menu and power button at the same time. When the lens is extended and it beeps, on my camera , the lens is *stuck* Give it a gentle tug , then try the power button again

just three months old?- return it to the Vendor for replacement and get onto the Samsung Tech support Team

look for a small pinhole and insert a pin immediately after power up to reset the camera