Why cant my phone connect with htc sync manager?

I used to have this problem too. After many things to try, uninstall and reinstall htc sync, etc, I've finally found the solution. I have read in some website it said we have to USE THE ORIGINAL USB CABLE which come with the htc phone. Then I've tried and it is unbelievable that it my laptop can find and sync everything immediately. After wasting my time for about 3 days to find out this problem, it's really work.

"The simplest solution i have found is to make sure HTC Sync manager on the PC is of the same version the phone is looking for. Looks like if the versions are different the phone does not get detected.

To do this:

1. Uninstall any existing HTC Sync Manager softwares on your PC completely

2. Connect your mobile to your PC

3. In your phone, in USB options choose ""CD Installer"" instead of ""Charging"" or ""File Transfers""

4. You will now see an image of HTC Sync Manager mounted on your PC. Just follow the standard instructions and install the HTC Sync Manager software

5. Launch the HTC Sync Manager software now. Disconnect and Reconnect the mobile

6. Phone should now be detected

Let me know if this works."

"https://www.youtube.com/watch?v=gjePFGa6...

help yourself ;)"

I tried absolutely everything for hours to connect to pc. Even HBOOT didn't connect. I thought it has to be the charging jack in my M7 that's faulty. Bought a new charge port flex off eBay and fitted it. Turns out that it was the problem .! The other symptom was a "Slow Charging" notification always came up even when connected to my HTC charger. That's what led me to believe the jack was faulty.

I am unable to syc my HTC one