Cannot Connect to PC. No USB Connection Notification Bar on Device (Samsung Galaxy Tab S)

I updated my Firmware to 4.4.2 using Samsung Kies, and had just notice it recently that I cant connect my tab to PC again. Usually, the there will be a notification bar on the device (like to choose MTP or USB) but right now, I cant even find it, no clue either.

I tried to scan my device using adb.exe but it return empty information. Different case when I plug my nexus 5.

Does anyone have an idea why this is happen? Suppose this caused by firmware update, how to fix it? Is it possible to downgrade it without connecting it to PC? I tried to factory reset it several times, but it will return to 4.4.2 again.

Please help. Any comment will be appreciated.

Device: Samsung Galaxy Tab S