More folks (with more experience) are going to comment, but FWIW:

I wouldn't dismiss the timing belt change and tune-up as NOT being a cause. More
than one mechanic has messed up basic maintenance. Check all the ignition wire
connections. Are all the plug wires connected? Distributor cap wires connected?
Give them a good shove onto their terminals. The new timing belt and/or new
water pump still may not have been correctly installed.

You say the car doesn't turn over at all. So the distributor rotor is not moving
at all, right, when you try to start the car?

I'd also look at the starter (as you already seem to be) and the alternator.
OTOH, when my 91 Civic LX's alternator died in 1999 after 106k miles, I got the
battery warning light.

If you have the time and interest, go to www.autozone.com , click on the "free
repair guides" link on the right, put in your car's info, and continue to your
car's specific manuals. I believe there are basic troubleshooting steps for
things like the starter and alternator there. Might take some reading, but I
have found the repair guides there very helpful. (They appear to be identical to
my Chilton's manual.)

Lastly, how old is your car's battery? Just because the lights etc. work doesn't
mean the battery is okay. Has starting been hard before this non-start condition
began? What's the voltage at the battery terminals? My 91 Honda's two previous
batteries each lasted 4.5 years. Last time one died the car was still starting
but the voltage was 10 volts (with the car off, IIRC).

"chudar2001" <chudar2001@yahoo.com> wrote
> Thanks Caroline for the valuable info, I just had the timing belt, water
> pump and a tune up last week. Measured 11.81 volts coming to into main
> relay socket. What else should be checked?