Connected to pc but charging only

Well, I haven't seen this problem before so I can only advise you on a couple of basic steps that I would take.

1. Switch off your phone.
2. Remove battery, SIM, and memory card and leave phone like that for at least 30 seconds.
2.1 If you have an SD card adapter or a USB Micro SD card reader, try putting your Micro SD into that and connect it directly to the computer to see what happens. If you still can't access it then it must be a problem with the memory card.
2.2 If you have connected the memory card directly to the computer try to see what the file format is. It should be FAT32 with a 32Kb alocation unit. This file system offers the best space / performance ratio for large memory card of 2GB or more.
3. Now, put your memory card, SIM and battery back in and switch it on again and wait for about 5 minutes to be 100% sure that all startup applications are up and running.
4. Go to the Setting > Connect to PC and mare sure the 'Ask me' option is selected.
5. Now, while making the sure the screen is NOT in standby (i.e. screen is not off and not locked), connect the phone to the computer.
6. The phone should ask you on-screen what type of connection you want.
7. Select 'Disk Drive' and click on done (or whatever the OK button is, I don't know it by heart).

Now, if you still can't access the memory card from you computer then you may have a problem. The next thing I would do is make sure that the USB port on the computer is not damaged or something. So, just to make sure, try connecting it to a different USB port. You should also try to connect it to a different computer and see if that works. Because if it does, it means that there may be a problem with your computer.

Bummer tried to mount my phone as a disk drive/sync the next day. Didn't work, only charges the phone. Don't tell me i have to reinsert the micro sd card again. Any suggestions?

I have much the same problem.

The support team advised that when installing HTC_sync on the PC you MUST disconnect from the internet. Apparently Windows 7 wanders on the internet to find drivers and pulls down and instals the wrong one !

The other thing is the USB port. The ports at the front of my PC don't work for this phone - I get 'unrecognised USB device'. But the ports at the back DO work. Don't ask . .

Rather than fiddle about at the back of the desktop unit every time, I simply connected to my laptop which runs Ubuntu Linux. Worked first time 

Just thought id post here for the benefit of anyone googling this problem as I did. I had the same problem - phone would only charge, wouldn't prompt for connection type or anything.

The problem for me was that I was using the usb cable from the car charger, not the mains charger! used the one from the mains charger instead and it worked fine. It seems like a ridiculous situation to me - it must cost them more money to create a separate cable, nevermind the support costs for people experiencing this problem.

Sane problem here - except i don't have a battery charger: my Desire won't communicate at all with the PC - I have it set to sync and charge: it charges, but there is no sign of sync not any sign that it is connected.  I've tried re-installing the HTC Sync program, setting the layout back to the original ... I have a lot of info on it which I don't want to lose (some was backed up last time when it did work).  I've had the machine just a week ... HELP!!  Thanks

My Desire connected to the pc normally. But asked: Please insert disk in drive ...
Soltution: format SD card within the phone SD card settings.

Settings, SD & Phone Storage, Unmount SD card (altough its grey), Format SD card, etc.

Restart Phone. Connect to pc. All worked fine. Even the root data was still on the SD Card.

Cheers,

Frank

Same problem here, does not work with rear USB port or the front. Using original data cable. Perform a hard reset and upgraded to version 2.2, but it did not help. can be connected only after the phone restart and it works a couple of hours.