Phone can't connect to PC via USB [Lollipop 5.0]

[Rayhan Nugraha]

Last week I upgraded my ASUS Zenfone 5 to Lollipop 5.0, before doing that, I backed up all my files to my pc via USB and it worked just fine. When I want to reconnect my phone, it didn't show anything. There's no notification for verification. USB Debugging is on and I checked the MTP option. My phone isn't showing up on the Windows Device Manager too. I tried 2 different cables and 3 different USB ports and it still didn't work. I've installed the ASUS USB Driver for Zenfone 5 A500CG. Please help me to find a workaround. Any kind of help is appreciated.

 

[B. Diddy]

Can you try connecting to another PC to see if the same thing happens? When you connect via USB and swipe down the notification panel, is there a USB icon there?

 

[Rukbat]

It's possible that 2 unconnected things happened at the same time - the phone updated to 5.0, and the microUSB port had one or more pins become disconnected from the motherboard. (I have an S5 like that - and due to the way it's built, it would take almost as much to repair it as to replace it with a good used one.)

 

[Rayhan Nugraha]

Can you try connecting to another PC to see if the same thing happens? When you connect via USB and swipe down the notification panel, is there a USB icon there?

There is no icon. And I already tested all 3 different cables and ports with my Galaxy Grand 2 (KitKat) and it works just fine, so I think the problem isn't with the ports or cable. And one more thing, I tried to connect a flash drive with an OTG cable, it didn't work too, it worked when I'm still on KitKat. Should I downgrade?

 

[Rayhan Nugraha]

the phone updated to 5.0, and the microUSB port had one or more pins become discinnected

So, you replaced the microUSB port with a new one? Or the entire PCB?

 

[B. Diddy]

Have you already tried wiping the cache partition? https://www.asus.com/zentalk/thread-3070-1-1.html

 

[Rayhan Nugraha]

Have you already tried wiping the cache partition?

I've wiped the cache partition and connected it again to the PC, nothing happened. Thanks for the suggestion, tho.

 

[B. Diddy]

How did you do the update -- was it an official OTA update, or did you manually download the update from a website? If the latter, is it possible that the update could've been for a different variant? I recall that with the Zenfone 2 line, there would be various different firmware files for the different variants, so you had to be careful which one you installed.

 

[Rayhan Nugraha]

How did you do the update -- was it an official OTA update, or did you manually download the update from a website? If the latter, is it possible that the update could've been for a different variant? I recall that with the Zenfone 2 line, there would be various different firmware files for the different variants, so you had to be careful which one you installed.

I downloaded it manually by following this guide https://www.asus.com/zentalk/thread-11408-1-1.html. The firmware is from ASUS' website.

 

[B. Diddy]

Ok, and the firmware was for your exact model number? I see from Wikipedia that there are 3 variants of the Zenfone 5 (A500CG, A501CG, and A500KL).

 

[Rayhan Nugraha]

My device model is ASUS-T00F (A500CG). And I think I downloaded the right firmware, the WW one.

 

[B. Diddy]

On the off chance that this is still related to a bad install, you could try redownloading the firmware file and reinstalling it.

 

[Rayhan Nugraha]

On the off chance that this is still related to a bad install, you could try redownloading the firmware file and reinstalling it.

Sorry for the long response, but I've reinstalled the firmware, it didn't fix it

 

[B. Diddy]

Ok, running out of ideas. See if this still happens in Safe Mode, in case some 3rd party app is interfering in some way. https://www.asus.com/zentalk/thread-1985-1-1.html. If it still happens in Safe Mode, then I'd guess that the firmware they put out is buggy. You could try contacting ASUS directly, but I'm not sure what kind of direct support they might give for a 4 year old phone. Good luck!

 

[Rayhan Nugraha]

Ok, running out of ideas. See if this still happens in Safe Mode, in case some 3rd party app is interfering in some way. https://www.asus.com/zentalk/thread-1985-1-1.html. If it still happens in Safe Mode, then I'd guess that the firmware they put out is buggy. You could try contacting ASUS directly, but I'm not sure what kind of direct support they might give for a 4 year old phone. Good luck!

Sadly, after reinstalling the firmware, my phone can't be turned on

 

[B. Diddy]

The screen doesn't even turn on? Have you already tried pressing and holding Power for about 20 seconds?