Hi,
I have a problem with Samsung Galaxy Tab A 10.1 2019 SM-T510 tablet.
The problem is a complete lack of voltage on the LCD.
Display has no backlight and no data (as if it was not connected to the device at all).
Tablet appears to be booting up.
Processor and memory are getting warm.
When I plug in the charger I hear sound from the speakers.
Device appears in the windows device manager (without any errors).
The enable signals for switching on all sections of the LCD power supply appear only for about 200ms. Both signals come directly from CPU.
It looks as if the CPU starts up and deliberately shuts down power to the ICs responsible for powering the LCD.
What I did:
> Checked that there is a connection between the power ICs and the connector on the LCD board (I ruled out a faulty display ribbon).
> I have checked that the backlight works i.e. I have applied the required power to the backlight and it lights up.
> Tried to determine if something else was heating up - to no avail.
> I measured most of the capacitors to find possible short-circuits - I didn't find any completely shorted to ground.
I have not included the schematic because I could not find it as a pdf file. The only place I found it is in the XinZhiZao software. I can provide additional schematics if needed.
Could you guys give me some suggestions as to where to look further for the fault?
Thank you so much for any help.
I have a problem with Samsung Galaxy Tab A 10.1 2019 SM-T510 tablet.
The problem is a complete lack of voltage on the LCD.
Display has no backlight and no data (as if it was not connected to the device at all).
Tablet appears to be booting up.
Processor and memory are getting warm.
When I plug in the charger I hear sound from the speakers.
Device appears in the windows device manager (without any errors).
The enable signals for switching on all sections of the LCD power supply appear only for about 200ms. Both signals come directly from CPU.
It looks as if the CPU starts up and deliberately shuts down power to the ICs responsible for powering the LCD.
What I did:
> Checked that there is a connection between the power ICs and the connector on the LCD board (I ruled out a faulty display ribbon).
> I have checked that the backlight works i.e. I have applied the required power to the backlight and it lights up.
> Tried to determine if something else was heating up - to no avail.
> I measured most of the capacitors to find possible short-circuits - I didn't find any completely shorted to ground.
I have not included the schematic because I could not find it as a pdf file. The only place I found it is in the XinZhiZao software. I can provide additional schematics if needed.
Could you guys give me some suggestions as to where to look further for the fault?
Thank you so much for any help.
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