2018 Q9FN Completely Reboots 5 times within one hour

[Raf1]

Yes. It's always the first thing I try when things start going bad..

[SamsungTam]

Thanks for checking for us. Please send us a private message to the link. This concern may need a repair set up. 

[userJyEs8NXzwS]

Same issue on my 2018 Q9FN. Also seems to only happen when playing xbox 1 x.

[Raf1]

Out of curiosity, what firmware are you on and what kind of HDMI cable are you using?  I really haven't had issues until firmware 1260.8 and an HDMI cable I just picked up which was rated a HDMI 2.1 cable.  Could be coincidence but maybe not. Haven't touched my setup since I set everything up in January but did change the HDMI cable this Saturday and firmware was just update last week as well so that could also be the issue. 

[user4IvrcSmezS]

I am having the same problem with my 3 months old Q7FN. It is a bad unit? I am in the 1251 firmware.

[Raf1]

My problem turned out to be the HDMI cables that I recently purchased.  I thought I would be proactive and upgraded all my cables to HDMI 2.1 standards and after changing everything over, that's when my reboots started.  I never would have thought that HDMI cables would cause such an issue but I spent last weekend experimenting with a few different cables, including some other HDMI 2.1 ones that I got from Monoprice and sure enough, the first 2.1 cables I received were the cause of my reboots.  The 2.1 cables I got from Monoprice are working great and reboots have completely stopped.  I had previously been using ATEVON 2.0 HDMI cables that I purchased from Amazon and those cables were awesome and are still being used for some of my gear in my entertainment center. 

[userwhRDo9BO75]

Hi

It's not a hardware problem, it's a freesinch option.

There are more topics but Samsung does not respond!!!

https://eu.community.samsung.com/t5/TV/Q9FN-random-reboot/m-p/1163027#M26986

https://eu.community.samsung.com/t5/TV/55-Q6FN-Reboot-Only-With-Xbox-One-X/m-p/1205112#M27699

[userPIud945Dd9]

Not sure if my situtaiion is related to the rebooting , but here it is . My Q9FN ( 9 month old ) wont power on all of the sudden . It worked fine almost daily since we bought it and suddenly wont power up. Tried powering from the remote, from the unit itself , disconnected from power for hours , nothing worked ! The only that happens is that I hear some faint clicking from the ONE CONNECT box, few clicks , then it stops  it is as if the unit is trying to reboot but something is preventing it . One Connect cable is not kincked bent or anything . Best I can get from Samsung was an apointment with their ONLY authorized service provider in the ENTIRE MIAMI FL area ! ( I find that shocking ) . That Tech service has already cancelled the first apopointment , lets see of they will honor the next appt. ( I have very little faith at this point given everything I am reading ) 

[useruF39r7ZzBF]

I've same issue. 

Q7FN + xbox one x (with orginal hdmi cable form xbox)

Everything was fine for 4 months till firmware update in may. When tv is on game mode, it keeps crashing / restarting. Samsung already send me service, they change one connect cable and it solved issue for 1-2 months, but few days ago my tv again start restarting on game mode. 

[Raf1]

Someone earlier in this thread mentioned freesync being the cause of the reboots but mine seemed to have completely stopped when I swapped to different HDMI cables.  I bought the monoprice 8k hdmi cables (hoping for eArc in a future update) and everything has been running without issues for the last month.  The only issue with those cables is they only come in 1.5 and 3 foot lenghts but in my setup that didn't much matter.  They're fairly cheap so if you have time, it's worth trying out.