there is no worldwide warranty - if you have a singapore warranty you will need to contact them for a fix and if needed ship it to them.
You may however be able to get paid support in india - i have gone down the gift path with the indian support team for my US ps3 and it doesn't work and tried telling US guys that i shifted to india and they didn't like that either
(this was when my ps3 got stolen and i wanted to get it blocked and tracked on psn) - you can try the gift trick though
