Samsung QN75Q60TAF Boot Loop fixed but no picture

[Nicktronic]

Re: Samsung QN75Q60TAF Boot Loop fixed but no picture

I found the SPI Flash, so will try to check with programmer tomorrow.

[Diah]

Re: Samsung QN75Q60TAF Boot Loop fixed but no picture

you need to find out PIN 5 DT602 where its go.. from photo cant follow it because the boards sandwich one. if it goes to cap you need to do check of it same way in reserve to find out the slow discharge.

[Nicktronic]

Re: Samsung QN75Q60TAF Boot Loop fixed but no picture

you need to find out PIN 5 DT602 where its go.. from photo cant follow it because the boards sandwich one. if it goes to cap you need to do check of it same way in reserve to find out the slow discharge.

Ok, will do

[Nicktronic]

Re: Samsung QN75Q60TAF Boot Loop fixed but no picture

I got the CH341 programmer, did the 3.3V mod and soldered the SPI Flash to the daughter board. I downloaded and installed the drivers for the CH341. I tried using Neo Programmer software but GD25B32CSIG was not in their list and auto detect did not work.

Does anybody have a suggestion of what program to use with the CH341?

[Diah]

Re: Samsung QN75Q60TAF Boot Loop fixed but no picture

use this auto detect


or this in attachment... GIGADEVICE your chip

[lotas]

Re: Samsung QN75Q60TAF Boot Loop fixed but no picture

I got the CH341 programmer, did the 3.3V mod and soldered the SPI Flash to the daughter board. I downloaded and installed the drivers for the CH341. I tried using Neo Programmer software but GD25B32CSIG was not in their list and auto detect did not work.

Does anybody have a suggestion of what program to use with the CH341?

If the Spi Flash chip is short, then not one programmer, not one program will detect it.

[nomoresonys]

Re: Samsung QN75Q60TAF Boot Loop fixed but no picture

So, did you order the new spi? looks like the quicker you get a new one the quicker you can get on with the repair attempt.

[Nicktronic]

Re: Samsung QN75Q60TAF Boot Loop fixed but no picture

So, did you order the new spi? looks like the quicker you get a new one the quicker you can get on with the repair attempt.

Yes, I ordered a new one.

[nomoresonys]

Re: Samsung QN75Q60TAF Boot Loop fixed but no picture

Ok, excellent, now you can experiment with the old one, looks like these guys have lots of suggestions for further testing.

[Nicktronic]

Re: Samsung QN75Q60TAF Boot Loop fixed but no picture

use this auto detect


or this in attachment... GIGADEVICE your chip

Tried with your program, still nothing but I want you to confirm I have the CH341 configured properly. I received a jumper that I did not use.

[lotas]

Re: Samsung QN75Q60TAF Boot Loop fixed but no picture

The program does not see your programmer, if the chip is short, as I already wrote, then it shortens the power supply of the programmer, remove the chip and start the program again.

[Nicktronic]

Re: Samsung QN75Q60TAF Boot Loop fixed but no picture

The program does not see your programmer, if the chip is short, as I already wrote, then it shortens the power supply of the programmer, remove the chip and start the program again.

Ah, I see, thanks

[Nicktronic]

Re: Samsung QN75Q60TAF Boot Loop fixed but no picture

you need to find out PIN 5 DT602 where its go.. from photo cant follow it because the boards sandwich one. if it goes to cap you need to do check of it same way in reserve to find out the slow discharge.

I checked every pin, cap, solder pad, test point etc on the board with LVDS and U cables removed and could not find a connection to anything from DT601 pin 5 and DT602 pin 5. Is it possible they are not used?

[Nicktronic]

Re: Samsung QN75Q60TAF Boot Loop fixed but no picture

The program does not see your programmer, if the chip is short, as I already wrote, then it shortens the power supply of the programmer, remove the chip and start the program again.

Same message with spi flash removed. No connect. I want know if the CH341 is configured properly....do i need to use the jumper? There are no instructions

[Nicktronic]

Re: Samsung QN75Q60TAF Boot Loop fixed but no picture

See in neo programmer, with SPI Flash removed and just the CH341 plugged in, it says cannot connect to CH341 and I don't know why.

[lotas]

Re: Samsung QN75Q60TAF Boot Loop fixed but no picture

See in neo programmer, with SPI Flash removed and just the CH341 plugged in, it says cannot connect to CH341 and I don't know why.

The drivers were installed correctly, it is determined in the device manager, the jumper is not needed here, it is for 5v.

[Nicktronic]

Re: Samsung QN75Q60TAF Boot Loop fixed but no picture

The drivers were installed correctly, it is determined in the device manager, the jumper is not needed here, it is for 5v.

Ok, I aslo did this mod; lift pin 28 of ch341 and jumper to 3.3V tab of regulator and also jumper to pin 9 of ch341. Should i have done this? I'm reading information now that says it was wrong to do that.

[Nicktronic]

Re: Samsung QN75Q60TAF Boot Loop fixed but no picture

The drivers were installed correctly, it is determined in the device manager, the jumper is not needed here, it is for 5v.

Yes, drivers installed correctly

[lotas]

Re: Samsung QN75Q60TAF Boot Loop fixed but no picture

it is determined in the device manager

[lotas]

Re: Samsung QN75Q60TAF Boot Loop fixed but no picture

Ok, I aslo did this mod; lift pin 28 of ch341 and jumper to 3.3V tab of regulator and also jumper to pin 9 of ch341. Should i have done this? I'm reading information now that says it was wrong to do that.

!!! DO NOT CONNECT 3.3V TO PIN 9 OF CH341 otherwise the CH341 will burn in 5.0v selection. !!!

Did you install a jumper when setting 9 pin to 3.3v?