topic Re: KDL-55W805C stuck in reboot cycle in Android TV

KDL-55W805C stuck in reboot cycle

patciantar — Wed, 11 Apr 2018 22:18:41 GMT

To whom it may concern,

My Sony KDL-55W805C yesterday seemed to have gotten stuck in a reboot cycle and is not turning on. The white LED light turns on for a few seconds then turns back off and repeats this infinitely. I have tried pressing up arrow and power button together but nothing happens, I have also pressed volume down and power button and LED turns green for a few seconds, turns off and then it resumes doing the infinite reboot cycle again. I have also tried downloading the firmware on a USB and inserting it into both USB ports and power cycling the TV and it had no effect whatsoever. TV was purchased November 29th 2016.

Kind regards, Patrick Ciantar

Re: KDL-55W805C stuck in reboot cycle

dutchice — Thu, 12 Apr 2018 00:19:09 GMT

Try this, and for step 13 this.

Re: KDL-55W805C stuck in reboot cycle

patciantar — Thu, 12 Apr 2018 06:56:16 GMT

I tried this now and it still didn’t work. I tried all 3 USB ports and even tried pressing volume down and power to get to the green LED but then it just continues back to the reboot loop.

I will try again with a different usb drive and also try copy the pkg file from a windows machine.

Do you have any other suggestions please?

Re: KDL-55W805C stuck in reboot cycle

dutchice — Thu, 12 Apr 2018 14:37:05 GMT

Before trying the more advanced troubleshooting from my previous post, I suppose you have tried this without any success already? You see it is very important that you have disconnected all cables from the TV, including the instructions of step 1 (shutting down the network). Basically there should be the power lead left connected only to the TV, and the power lead should run directly to a wall power outlet. Sometime having the TV left disconnected for over 12 hours might even be better.

In the event that none of that made a difference, then proceed with the Recovery Process on my previous post. Also before starting, remember that only the power lead must be connected to the TV and it should run directly to your wall power outlet. Here are a few notes on the Recovery Process:

Make sure, the files you download are not corrupt in any way. A good trick is to download the files twice on different locations on the same PC and compare the file sizes together. If they don't match to the last digit, repeat downloading them twice again then recheck.
Try using a fairly recent USB stick. Often old sticks have many aging issues leading to corrupt sectors which are not reported by any PC. Buying a brand new USB stick around the corner could save you lots of headaches at the end of the day. A USB stick with a built-in activity LED often is a good way to verify if the TV is accessing the recovery file at boot time.
Do not forget to select the FAT32 format with default allocation sectors when formatting the stick. Formatting with a standard Windows PC does sometimes make a difference, as some devices are extremely picky on the partitioning of the stick. RUFUS is a good open-source tool for this. The stick does not need to be formated as bootable.
Be assured that you have extracted the file with the .PKG extension from the ZIP file that you have downloaded, and placed ONLY that file on the USB stick. Not inside any folder but simply at root level.
Mind you that Step 4 from my previous post should read "Power off the TV set".

If you are not that tech savvy yourself, perhaps you could ask a younger family member which is good at computers to help you out. Just remember that at the end of the day, you always have the option to call your local SONY support number and take in your TV for service.

Re: KDL-55W805C stuck in reboot cycle

patciantar — Thu, 12 Apr 2018 17:14:18 GMT

Hi,

Thank you for getting back to me.

Yes the TV has nothing connected to it except the power cord and all networking is turned off.

I have tried 3 different USB sticks, the last one has an LED indicator. This shows it flashing once every few seconds - so not exactly accessing it as it would when reading off it.

I have tried all the suggestions you mentioned...anything else?

This was bought from the UK and I have moved to Malta now. I worry that if I were to contact a Sony representative locally I will be charged for any repairs even though the device is still under warranty.

Thank you

Re: KDL-55W805C stuck in reboot cycle

dutchice — Thu, 12 Apr 2018 17:36:06 GMT

Read your private messages. Click on the envelope icon on the very top of the page.

Re: KDL-55W805C stuck in reboot cycle

Abjal89 — Sat, 26 May 2018 00:57:00 GMT

My model is KDL-50W805C and it keeps restarting. Does not go onto home screen. Occasionally the starting android comes up saying it’s optimising apps but then reboots again. Very frustrating!

I’ve tried the volume and power button. Noting is working.

Please share knowledge or help 😞

football is on tomorrow 😞

Re: KDL-55W805C stuck in reboot cycle

patciantar — Sat, 26 May 2018 05:16:44 GMT

I’m sorry I didn’t manage anything and ended up returning it =\

Re: KDL-55W805C stuck in reboot cycle

stuart_h2019 — Mon, 29 Apr 2019 13:46:09 GMT

Hi I ahve exactly the same problem. Same model purchased nov 2016, hasn't been used much as in spare room. Was working great about 3 weeks ago. Then tried to turn on and this boot loop started. Don't know if due to software update. The TV led comes on white then turns off after about 10 seconds then again, occasionally getting to the symbols on screen whish disappear after about 2 or 3 seconds. Have tried the factory reboot unplug power on hold hold vol-. I get the green light for about 5 seconds then the tv starts the cycle again. Have tried howloading new firmware but the usb just flashes a couple of times in ports 1 to 3. (The set probably isnt staying on long enough to detect it) have downloaded the roalback patch to another usb and again still not reading it. Have emailed sony and am waiting to hear. But this is obvioulsy a common fault (Without a solution at the moment!) sony really should fix it or i won't buying any more of there TV's. Any suggestions on what else to try?

Re: KDL-55W805C stuck in reboot cycle

contactdipesh — Fri, 24 May 2019 13:37:45 GMT

Any luck with your tv.. as i am getting same error.

Re: KDL-55W805C stuck in reboot cycle

onunez — Sun, 07 Jul 2019 03:06:53 GMT

I'm having exactly the same problem, did someone could fix this problem??
Thanks

Re: KDL-55W805C stuck in reboot cycle

dutchice — Mon, 08 Jul 2019 05:12:12 GMT

Hi @onunez,

From your description it sounds to me that your TV has the same hardware fault as all others. Unfortunately hardware faults are related to parts which require a repair shop to service. If your TV is still under warranty the repair service will be offered free of charge. Else you will receive a quote from the service shop for the repair cost which depending on the current value of your TV might not be worth spending.

Cheers,

Dutchice

Re: KDL-55W805C stuck in reboot cycle

onunez — Mon, 08 Jul 2019 17:01:46 GMT

Hi Dutchice,

First.. thanks for your prompt answer.

Unfortunately my TV is out of warranty (6 months), if you don't mind I need to ask a couple more questions:

1. Based on your experience why you think parts need to be replaced?

2. Could you please mention some of these parts, any internal board, LEDs?

I know this could be hard to answer without a proper tech evaluation but if some of these parts are expensive then maybe it doesn't make sense to fix it, instead I will have a fancy and thin fish tank.

Sorry for my sarcastic comment but I'm a little disappointed.........

Thanks for your help.

Re: KDL-55W805C stuck in reboot cycle

omphii — Tue, 09 Jul 2019 17:58:09 GMT

Hi. Got exactly the same problem with my KDL-43W755C, bought in Nov 2016. Woke up in the morning and TV was already doing the endless reboot cycle shenanigans on me (possibly all night). Since it's out of warranty and contracted service which sony recommended is bloody expensive, I would appreciate any clues at all. Maybe someone with similar problem gave it out to warranty service and was told what was the problem? Anything...

Re: KDL-55W805C stuck in reboot cycle

dutchice — Tue, 09 Jul 2019 22:19:29 GMT

Hi @onunez,

Please find the answers to your questions below:

The specific components that turn defective by time are integrated on the mainboard. You are not able to solder electronic integrated circuits onto the mainboard yourself, even if you were able to get a hold of the individual components. These type of components are soldered in the factory by highly accurate SMT machines.
To fix the TV yourself you will therefor be required to replace the complete mainboard of the TV. If you have the skills to replace the mainboard yourself, you could place an order for your TV's mainboard here for £208.51 ex. VAT.

I totally understand your disappointed and I also agree with you that a Sony TV certainly must last considerably longer.

Note however that if you were to walk in any TV repair shop in the UK, there will be no single brand of TV (in need for repair) which will form a clear majority in the shop. All TV manufacturer brands rely on the quality of components which are delivered by third-party suppliers. Unfortunately despite extremely high quality assessments in the selection process of third-party suppliers, at times certain components delivered by third-party suppliers prove not to meet the high quality standards expected by Sony. The reason why Sony pro-actively monitors the lifecycle expectancy of its products in order to identify shortcomings in assessment methods and rectify them for future acquisition of components from third-party suppliers.

Cheers,

Dutchice

Re: KDL-55W805C stuck in reboot cycle

onunez — Sat, 13 Jul 2019 21:16:56 GMT

Hi Dutchice,

I do agree, thankfully I have access to rework/repair soldering tools and machines, I'm a Manufacturing Engineer for a world leader electronic company (US company) with a facility here in Costa Rica.

That's why is even more frustrating when you have the some knowledge and tools but everything what I found in internet looks to me doesn't resolve this problem, since I believe this is a software problem, I also contacted Sony latinoamerica after had a chat with Sony USA (based on their recommendation), following their standard methods and guess what NO answer back from them 6 days later after I contacted them.........

I also called to a couple "approved" Sony repair shops here, listed in his webpage, and after 1 minute conversation I realized these guys don't have a clue what I'm taking about, the only thing they now for sure is the initial revision payment (~100 usd) this price based on the size of your TV......... yes even more ridiculous............

Well........ Anyhow thank you so much for your help.... at least I shared my frustration with a stranger that is thousand miles away.

Pura Vida,

Orlando.

Re: KDL-55W805C stuck in reboot cycle

onunez — Sat, 13 Jul 2019 21:31:31 GMT

Hi omphii,

Unfortunately I couldn't find anything yet, please see my answer to Dutchice in this same post.

Mine is a KDL55w805C....... Fancy fish tank we have now..... At least we could watch Nemo in this TV.....FOR EVER...

Please let me know if you find something.

Pura Vida,

Orlando.

Re: KDL-55W805C stuck in reboot cycle

omphii — Mon, 22 Jul 2019 11:11:26 GMT

Hi onunez,

I found some local tv repair service and based on my description over the phone, the guy told me it might be some smd memory chip, that needs to be taken out and reprogrammed externally.. But since they were on holiday and I was eager to fix it I started looking for the whole mainboard. I was lucky enough to find new one from a Tv damaged during transport for 58$. It was a bit diffrent model than mine but the part nr was the same (1-893-880-11). I'm pretty sure you have the same one in yours. I've installed it in my TV, put newest firmware on a clean USB drive and it works like a charm ever since You can switch between TV models in your service mode if you get board from a diffrent tv. I'm not sure if this info helps you at all but good luck with your fancy fish tank

Best wishes,

Tom

Re: KDL-55W805C stuck in reboot cycle

disappointed85 — Fri, 23 Aug 2019 09:32:57 GMT

Hi everybody,

I have the exact same model (purchased in October 2016) and the same issue described. It is out of warranty so I opened it up but the part number of the main board is different, my PCB part number was 1-980-805-31, whilst everywhere in here and also in general online the main PCB for this tv model is 1-893-880-11. Could you please advise whether you think the item would be compatible, or how to best address the issue? I cannot seem to find my part number from any supplier.

Thanks in advance!

Re: KDL-55W805C stuck in reboot cycle

Pajanos98 — Fri, 13 Sep 2019 09:00:46 GMT

Hi, I have the same problem with my Android-tv KDL-55W755C (almost identical to W805C) . My PCB is 1-980-805-31, screen T550HVF06.0 I tried main board with the same part number , but from KDL-55W807C (screen T550HVF06.1), but without success - tv was completely dead. When I'm looking for the new PCB in internet, the most W755C were produced with 1-893-880-11 (screen nr is identical). Can I use this another part number? Thanx