The lens on my L730 digital camera does not open.

OK this might sound harsh but i just did this. I pushed in, gently with some force, on the lens while pushing the power button. It made a gawd awful crunch sound, but it worked. Good luck.

It requires service or repair

Just fixed mine, if the lens is out that's the problem we had, it was jammed and not allowing it to switch on, we gently pushed it back in, then switched on, the lens came out a bit then jammed, pushed it in again & kept doing it until it cleared the blockage.  
Works fine now!  
Hope it works for yo

get a butter knife or any thin object like that and use it to push out the lens and turning it on at the same time  you will hear a clicking noise which is normal  once completely out, use your hand with a gentle but firm presure move it form left to right 
and then hopefully it should work after that 
x

take out the battery wait for a few sec and then put the battery back on, then switch the camera on.
for the lens try to gently force open or close the lens.
this works on my camera. i have the same problems. hope this helps.

Hi
Had the same problem a few months ago.There was a high pitchedwhisltle and I think the screen said "lens fault.turn off camera" or something similar.Bought a G9 to replace as the 7 was out of guarantee but sent the 9 back to the e-bay reseller as it was obviously secondhand with grit around the lens ring and the viewfinder.Ebay never again!.So 3 months ago ago I tried the G7 again with a fresh charged battery before I consigned the camera to the loft.I noticed that each time i switched on the whistle and message was there but the lens extended slightly further each timeso I kept rebooting until the lens was fully extended.Turned the camera off and on again and everything was back to normal.It seems that this may be Canons protocol when a camera goes back.Its been absolutely fine until today.It wont boot up at all.I have tried 2 fresh charged batteries and its dead.Any ideas anyone?

I've got the same problem please let me know if you figure out what the problem is, i'll do the same if i firgure it out, i feel lost without my camera

how about give us our money back!

same prob

A lens error is something that can only be fixed my sending in to the repairs department. There is nothing that can be done at home to fix that.