Jumper t8sg blank screen

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07 Jan 2018 23:54 #66762 by berserker_aerial
Jumper t8sg blank screen was created by berserker_aerial
Just got radio and updated to nightly build for this radio and now I have a blank screen.

I have pic of the remote
USB still connects and dfu mode still connects to pc but after loading dfu Will not show nothing on display
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08 Jan 2018 06:29 #66764 by vlad_vy
Replied by vlad_vy on topic Jumper t8sg blank screen
Probably Tx filesystem is damaged. Try to format USB drive and write filesystem from firmware archive.

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08 Jan 2018 11:33 #66766 by berserker_aerial
Replied by berserker_aerial on topic Jumper t8sg blank screen
Will try that again
Thanks

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08 Jan 2018 23:05 - 09 Jan 2018 01:28 #66771 by berserker_aerial
Replied by berserker_aerial on topic Jumper t8sg blank screen
What files do not get copied to the tx

( I was to frustrated to get the manual as radio. Is less then 1 week old )
Last edit: 09 Jan 2018 01:28 by berserker_aerial.

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09 Jan 2018 00:06 #66773 by berserker_aerial
Replied by berserker_aerial on topic Jumper t8sg blank screen
Ok file system and firmware are working like they should .

My problem is the backlight and contrast is out of whack I have yo tilt the transmitter just to get a glimpse of the display but not enough to make any changes to. Contrast and backlight
Any ideas

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09 Jan 2018 02:04 #66774 by berserker_aerial
Replied by berserker_aerial on topic Jumper t8sg blank screen
Spent the last hour trying to get the angle for camera
Any help would be great
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09 Jan 2018 04:23 #66775 by vlad_vy
Replied by vlad_vy on topic Jumper t8sg blank screen
Press ENT, enter Transmitter menu, enter Transmitter config, scroll down to LCD settings, set Backlight and Contrast to your taste. Then calibrate sticks along with rotary knobs.

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10 Jan 2018 03:12 #66794 by berserker_aerial
Replied by berserker_aerial on topic Jumper t8sg blank screen
Tried this several times and did not work
I am at loss here

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10 Jan 2018 03:40 - 10 Jan 2018 05:25 #66795 by vlad_vy
Replied by vlad_vy on topic Jumper t8sg blank screen
If clean install (flash firmware, format USB drive, copy filesystem) doesn't help, it look like it is a hardware problem.

What battery do you use? Level of charge? Do you use "Safely remove hardware" after copy filesystem?

As last resort you can try the build based on stable v5.0.0 release, I successfully use it with two different T8SG:
www.deviationtx.com/forum/builds/6407-de...cols?start=260#66689
Last edit: 10 Jan 2018 05:25 by vlad_vy.

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10 Jan 2018 07:59 #66796 by Burns2000
Replied by Burns2000 on topic Jumper t8sg blank screen
Hello, I have the same Problem, I got my Transmitter yesterday. I think it`s a new revision with the USB Port diagonal in the transmitter case. I was not able to bind with a Flysky FS-ia6 Receiver so I decide to do a Software Update. After flashing the Display isn`t readable. I managed to go to the Positon LCD Backlight and Contrast, but no chance, the Display font is no more readable. I flashed latest stable Builds and all other Nightly al withe ete same resault. Any Idears?
Thank you

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10 Jan 2018 12:54 - 10 Jan 2018 13:18 #66802 by vlad_vy
Replied by vlad_vy on topic Jumper t8sg blank screen
It looks like Jumper changed LCD (RXK12864-16-9) without notice.

Can you remove mainboard and read LCD marking?

Can you see anything on the screen with firmware update mode?

By the way, if I remove all files at USB drive, I have white screen that dim over some time. So, it can be damaged filesystem. Use "Safely remove hardware" if you change anything at filesystem from PC.
Last edit: 10 Jan 2018 13:18 by vlad_vy.

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10 Jan 2018 13:31 #66805 by Burns2000
Replied by Burns2000 on topic Jumper t8sg blank screen
Hi, on LCD is no font. The Mainboard is T8SG-V2. I tried Safetly remove hardware. I can`t read any Letter on the LCD.

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10 Jan 2018 15:38 #66806 by Moeder
Replied by Moeder on topic Jumper t8sg blank screen
@vlad_vy: didn't we change the contrast setting scaling for the first t8sg batch? Since the display seems to be addressed correctly (looking at the photo above) could you make a simple testbuild using the "old" devo7e calculation of contrast setting? Annoying nonetheless...

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10 Jan 2018 15:44 - 10 Jan 2018 16:10 #66807 by vlad_vy
Replied by vlad_vy on topic Jumper t8sg blank screen
That's why I ask - Can you see anything on the screen with firmware update mode?

If it is LCD with devo7e contrast scaling, we have to see bootloader screen.

The first photo of this topic is completely the same I can see with empty T8SG USB drive. If I press ENT I can see scrollbar at the right.
Last edit: 10 Jan 2018 16:10 by vlad_vy.

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10 Jan 2018 16:14 #66808 by Moeder
Replied by Moeder on topic Jumper t8sg blank screen
Not necessarily, there were also two additional registers set in devo7e. Judging from picture two in the thread it is only a contrast setting issue

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10 Jan 2018 16:25 - 10 Jan 2018 16:33 #66809 by vlad_vy
Replied by vlad_vy on topic Jumper t8sg blank screen
Anyway you can flash devo7e-256 firmware for testing. The screen will be vertically inverted, but will possible to test contrast setting.

Last edit: 10 Jan 2018 16:33 by vlad_vy.

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10 Jan 2018 17:01 #66810 by Burns2000
Replied by Burns2000 on topic Jumper t8sg blank screen
I flashed 7e-256 firmware, same result, the contrast is too low, crazy.

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10 Jan 2018 17:12 #66811 by vlad_vy
Replied by vlad_vy on topic Jumper t8sg blank screen
Are you sure that your battery fully charged? What battery do you use?

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10 Jan 2018 17:36 #66812 by berserker_aerial
Replied by berserker_aerial on topic Jumper t8sg blank screen
Ok when go in to dfu mode I get a black screen
If you tilt it a little you can see Chinese wright and a bar graph that's at 50 percent

If you need me to take main board out Incan look at the markings and and send pics ..

I didn't have any issues with radio untill I updated
Is there any way to back up my radio and send to you to view it ..

I Will do what it takes to get you the information you need .

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10 Jan 2018 17:37 #66813 by berserker_aerial
Replied by berserker_aerial on topic Jumper t8sg blank screen
Sorry for spelling my phone is a little to smart when using autocorrect

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