Hardware Dock mode only

[Ttm3]

I've got a switch that works perfect on the dock but displays nothing on the console. The backlight is on just nothing on the lcd. I've tried it in few housings also so I know it isn't the screen. Any ideas?

 

[bombob]

Check screen connetlctor for crossed or displaced pins

Sent from my SM-N960U using Tapatalk

 

[Ttm3]

Check screen connetlctor for crossed or displaced pins

Sent from my SM-N960U using Tapatalk

I forgot to mention. It did have a bad lcd conector. I got it straightened out but the problem persisted so I replaced the lcd connector and that didn't change anything either

 

[leerpsp]

Has it ever been taken apart? was it a used switch and was like that when you got it? and I would try what bombob told you if you think you can do it without missing it up

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I forgot to mention. It did have a bad lcd conector. I got it straightened out but the problem persisted so I replaced the lcd connector and that didn't change anything either

you replaced the lcd connector as in the one on the board? did you do it right because a bad solder job can keep it from working/working right, did you try replacing the whole LCD screen? also did you ever put a new gamecard slot in the switch because that can sometimes make some funny things happen.

 

[Ttm3]

Has it ever been taken apart? was it a used switch and was like that when you got it? and I would try what bombob told you if you think you can do it without missing it up

--------------------- MERGED ---------------------------

you replaced the lcd connector as in the one on the board? did you do it right because a bad solder job can keep it from working/working right, did you try replacing the whole LCD screen? also did you ever put a new gamecard slot in the switch because that can sometimes make some funny things happen.

Yes. I've replaced several. I think I did a bang up job. But maybe I'll try to get a close up pic and you guys can beat me up on my work

I tried it with multiple LCD's.

I leave the game card reader out till I'm sure everything else is good.

 

[Ttm3]

I think it looks factory

 

[leerpsp]

I think it looks factory

ya it does good job, so no pads come up on you when you disordered did it? also the connecter could be bad but dont know anyone that gets that unlucky, get your meter out and check fuses and chips leading to that connecter.

 

[Ttm3]

ya it does good job, so no pads come up on you when you disordered did it? also the connecter could be bad but dont know anyone that gets that unlucky, get your meter out and check fuses and chips leading to that connecter.

That's why I'm here. I'm not sure which ones drive it. Thanks

 

[iTechCareRepair]

Check p13usb video chip, could have a short when Those pads Crossed

 

[Ttm3]

Check p13usb video chip, could have a short when Those pads Crossed

I was under the impression the p13 was just responsible for sending the signal to the tv and if it displays on the tv it should be fine. Either way I'll remove it and see if that changes anything
Thanks for your help

 

[Ttm3]

Okay so I removed the p13 and I still only get the back light on the console

 

[SheriffBuck]

The PI3 purely deals with multiplexing the output over USB Type-C and it's clearly working if you are docking and getting a picture. The M92 does some marshalling of the various modes using three discrete lines. CONF0, 1, 2. I currently believe comms with it is purely one-way via the 3 discrete lines.






Conf0 covers connector orientation (in handheld mode, you could still be charging for example)
Conf1 covers whether it is in dock mode (this sends USB3 + 2 Lane DP over USB Type-C)
Conf2 deals with variations of the number of lanes

There are occasions when the backlight does come on when it is docked. That's normally to display a charging symbol for example. Sounds like your LCD and backlight are working if you have tried different front assemblies, your soldering looks great on the LCD connector and we know the backlight controller is working as you said you are getting a backlight.

So check Pin 36's test pad to see if it is high when in handheld mode. It shouldn't be.

I know the Tegra monitors these three lines from the M92 as it has to do various other procedures like suppressing screen, showing charge symbol etc.

Hopefully this gives you a steer!
Sheriff.

 

[Ttm3]

The PI3 purely deals with multiplexing the output over USB Type-C and it's clearly working if you are docking and getting a picture. The M92 does some marshalling of the various modes using three discrete lines. CONF0, 1, 2. I currently believe comms with it is purely one-way via the 3 discrete lines.

View attachment 213441


View attachment 213442

Conf0 covers connector orientation (in handheld mode, you could still be charging for example)
Conf1 covers whether it is in dock mode (this sends USB3 + 2 Lane DP over USB Type-C)
Conf2 deals with variations of the number of lanes

There are occasions when the backlight does come on when it is docked. That's normally to display a charging symbol for example. Sounds like your LCD and backlight are working if you have tried different front assemblies, your soldering looks great on the LCD connector and we know the backlight controller is working as you said you are getting a backlight.

So check Pin 36's test pad to see if it is high when in handheld mode. It shouldn't be.

I know the Tegra monitors these three lines from the M92 as it has to do various other procedures like suppressing screen, showing charge symbol etc.

Hopefully this gives you a steer!
Sheriff.

Great info. Thank you.

 

[bombob]

The PI3 purely deals with multiplexing the output over USB Type-C and it's clearly working if you are docking and getting a picture. The M92 does some marshalling of the various modes using three discrete lines. CONF0, 1, 2. I currently believe comms with it is purely one-way via the 3 discrete lines.

View attachment 213441


View attachment 213442

Conf0 covers connector orientation (in handheld mode, you could still be charging for example)
Conf1 covers whether it is in dock mode (this sends USB3 + 2 Lane DP over USB Type-C)
Conf2 deals with variations of the number of lanes

There are occasions when the backlight does come on when it is docked. That's normally to display a charging symbol for example. Sounds like your LCD and backlight are working if you have tried different front assemblies, your soldering looks great on the LCD connector and we know the backlight controller is working as you said you are getting a backlight.

So check Pin 36's test pad to see if it is high when in handheld mode. It shouldn't be.

I know the Tegra monitors these three lines from the M92 as it has to do various other procedures like suppressing screen, showing charge symbol etc.

Hopefully this gives you a steer!
Sheriff.

You were the first person to tell me that the switch is supposed to work without the p13usb and now you are adding another great knowledge on that chip [emoji119]

Sent from my SM-N960U using Tapatalk

 

[pit12]

Did you get managed?
I have the same Problem, everything works, accept for the screen.
I want to try measure Pin 35,36,38, does anybody know which voltage it should show?

 

[Ttm3]

Did you get managed?
I have the same Problem, everything works, accept for the screen.
I want to try measure Pin 35,36,38, does anybody know which voltage it should show?

I had no luck figuring this one out.

 

[Crossfader]

I have Same Probleme, in Dock Mode the Switch works. The Connector is new soldered and the backlight is on.

I tested the connection in Diode Mode and 3 Values shown as OL. Where are these Contacts going?