When it doesn't boot past the HTC screen and you've tried a factory reset, then there's nothing else you can really do, unless you want to invalidate the warranty and risk bricking your phone.

Time to take it back to be repaired.

 

I don't think there's any way. The factory reset is usually the last weapon of choice in trying to solve these problems - any type of problem. You can try doing a soft reset without the SIM and SD card in your phone - Power off phone > Remove battery for 30 seconds > Replace battery and power on phone - but it looks like your fault is beyond that solution.

Rooting a phone enables users to have complete control over the software that goes on their phone - firmware, operating system and applications. Doing this invalidates the warranty, unless you're able to roll-back what you've done. Because your phone currently has a fault which looks software related, this would be a highly risky stragey, even for those who know their way around rooting phones. Only if you can afford to brick yours and pay for it to be repaired should you consider this. And rooting, per se, wouldn't solve your problem. You'd then have to flash a new, uncorrupted ROM to your phone.

 

Hi all,

I had exactly the same problems. Took it back to the T-Mobile shop and they sent it for repair so now using the old hero (which was great at the time but no comparison to the Desire S).

Unfortunately though It is now 3 weeks since it went in for repair and looking at the repair status at tmobile online it has been 2 weeks awaiting parts. I've contacted tmobile 3 times and the actual repair centre once. the repair centre told me that my phone needs a new mother board so basically everything will be replaced except the
shell. But because the parts are coming from htc they don't know when it will be reparied.

Im really annoyed about this, i cant understand why tmobile cant give me a replacement if everything is being replaced anyway (except the case). I'm getting gradually more annoyed.

I had the phone less than 3 months. I understand things go wrong but the level of service is shoddy at best and customer services just dont care. Hope you have more luck... and if you do can you reply and let me know as i cant bear using my hero any longer... its so slow!