Help to downgrade B550

Here for general support for B series TVs, request and problem solve area.

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juusso
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Re: [How-To] Roll back LExxB5xx, LExxB62x, UExxB6xxx

Post by juusso »

Do you have ExLink already? Connect it and check u-boot acces or/and shell.
LE40B653T5W,UE40D6750,UE65Q8C
Have questions? Read SamyGO Wiki, Search on forum first!
FFB (v0.8), FFB for CI+ . Get root on: C series, D series, E series, F series, H series. rooting K series, exeDSP/exeTV patches[C/D/E/F/H]

DO NOT EVER INSTALL FIRMWARE UPGRADE

ZeroZorro
Posts: 20
Joined: Tue Mar 27, 2012 3:34 pm

Re: [How-To] Roll back LExxB5xx, LExxB62x, UExxB6xxx

Post by ZeroZorro »

So, this result is not good is it?

I think the fact there is some 'activity' is okay, but what know?
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ZeroZorro
Posts: 20
Joined: Tue Mar 27, 2012 3:34 pm

Re: [How-To] Roll back LExxB5xx, LExxB62x, UExxB6xxx

Post by ZeroZorro »

I connected the Ex-link cable, started Putty (admin mode) and turn on the TV (with the remote)
I see a lot of activity like the attached image in previous post in my terminal screen.
After that, the tv is on and if i use my remote it gives this 'rubbish' on the Putty-terminal
If i try to type 'debug' in the terminal it's the same.
Last edited by ZeroZorro on Tue Oct 16, 2012 5:23 pm, edited 1 time in total.

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juusso
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Re: [How-To] Roll back LExxB5xx, LExxB62x, UExxB6xxx

Post by juusso »

this, what you get most probably is because wrong connection parameters. (speed?)
You have to get readable text.

Try to change encoding (putty- window -translation - UTF8)
LE40B653T5W,UE40D6750,UE65Q8C
Have questions? Read SamyGO Wiki, Search on forum first!
FFB (v0.8), FFB for CI+ . Get root on: C series, D series, E series, F series, H series. rooting K series, exeDSP/exeTV patches[C/D/E/F/H]

DO NOT EVER INSTALL FIRMWARE UPGRADE

ZeroZorro
Posts: 20
Joined: Tue Mar 27, 2012 3:34 pm

Re: [How-To] Roll back LExxB5xx, LExxB62x, UExxB6xxx

Post by ZeroZorro »

okay thanks, will try again, the setting i used:

Serial Com1
Speed 115200
Data Bits 8
Stop Bits 1
Parity None
Flow Control None

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juusso
SamyGO Moderator
Posts: 10124
Joined: Sun Mar 07, 2010 6:20 pm

Re: [How-To] Roll back LExxB5xx, LExxB62x, UExxB6xxx

Post by juusso »

what is your result?
LE40B653T5W,UE40D6750,UE65Q8C
Have questions? Read SamyGO Wiki, Search on forum first!
FFB (v0.8), FFB for CI+ . Get root on: C series, D series, E series, F series, H series. rooting K series, exeDSP/exeTV patches[C/D/E/F/H]

DO NOT EVER INSTALL FIRMWARE UPGRADE

ZeroZorro
Posts: 20
Joined: Tue Mar 27, 2012 3:34 pm

Re: [How-To] Roll back LExxB5xx, LExxB62x, UExxB6xxx

Post by ZeroZorro »

This is what i get now
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juusso
SamyGO Moderator
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Re: [How-To] Roll back LExxB5xx, LExxB62x, UExxB6xxx

Post by juusso »

Somehow i think your cable is not ok. Have you tried to make loopback test?
Working exlink cable is the key to success.
LE40B653T5W,UE40D6750,UE65Q8C
Have questions? Read SamyGO Wiki, Search on forum first!
FFB (v0.8), FFB for CI+ . Get root on: C series, D series, E series, F series, H series. rooting K series, exeDSP/exeTV patches[C/D/E/F/H]

DO NOT EVER INSTALL FIRMWARE UPGRADE

ZeroZorro
Posts: 20
Joined: Tue Mar 27, 2012 3:34 pm

Re: [How-To] Roll back LExxB5xx, LExxB62x, UExxB6xxx

Post by ZeroZorro »

juuso wrote:Somehow i think your cable is not ok. Have you tried to make loopback test?
Working exlink cable is the key to success.
I will try that tonight, wrong cable good bee the issue. I'll search for a way to do a loopback test and report back...
Thanks again!

ZeroZorro
Posts: 20
Joined: Tue Mar 27, 2012 3:34 pm

Re: [How-To] Roll back LExxB5xx, LExxB62x, UExxB6xxx

Post by ZeroZorro »

I did the loop-back test en while in Putty i typed the 26 chars of the alphabet, this screen is the result of that.

:?: not good enough i guess?
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