Just had a customer bring in a M2 MBA A2681 that had had a screen replacement in April at another repairer. Since then, she has been getting intermittent kernel panics. It's an aftermarket screen, and of course it fails in diagnostics as the calibration hasn't been done. The error in the panic log is "No device added after powering on the rails".

It seems the original repairer has swapped the board and the screen to other MAC's, and said that it isn't a screen issue. From what I understand, by doing a quick search on Google, this is in fact a screen issue. The panic relates...

Hello,
i want to repair an Onkyo TX-NR809 receiver.

symptoms:
on power on, display appears and i hear one click. enue functions is given.
- no hdmi output
- audio output not tested, but i think it is not there
- usb sticks are not recognized

if i read out the chips with display+standby button + tone+
both dts show only ????

chip is D830K013BZKB4

things i have done:
- reflow of the dts chip without taking off and reballing
- changed the aluminium caps without the big one with 25v because i dont...

Hi, I have a Samsung UE50TU with:
- sound and backlight, but no picture
- when it arrived, it had a picture for a few seconds
- it keeps rebooting
- without ribbon cable between the two panel boards, it does not reboot but I have no picture
- without cable between mainboard and lcd panel, it does not reboot (but obviously i have no picture)
- when i try a tape fix, its keeps rebooting, unless I tape off pin 1 (the innermost pin). In that case it does not reboot but I have no picture.

- without cable between mainboard and lcd panel and with a jumpered...

Hi all.

I'm trying to fix my Samsung QE50Q60TA TV.
IT's rebooting every few seconds.
I have done some tests and it looks like it stops rebooting when I tape pin 46 (I thinks it's FB_1) on the ribbon tape that connects two boards atteched to screen, but nothing is visible, just backlight is solid and I can hear sound. Taping over other pins doesn't work.
Have also soldered two pins on the motherboard to check if I can get an image on the rights side of the tv, but it keeps rebooting.
Can anyone suggest what I can test and do to get it working again please?...

Hello everyone, I'm working on a Samsung TV that constantly rebooting.

MB/PSU unit: BN9654185QE

It loads up to the main menu then as soon as the backlight goes brighter it reboots.

First I suspected the LCD panel, so a disconnected the LCD display from the mainboard but did the same thing.

Then I removed the backlight connector which only delayed the bootloop by a minute maybe, I know it because I test it with the remote, it does gives the menu sounds a bit longer.

Also I have to note, that the MB/PSU combo gives out a very noticible...