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#3941 - 12/03/15 09:59 PM
HDMI failure
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VIP Japhar
stranger
Registered: 09/02/15
Posts: 6
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Hi! Suddenly, we have no picture from the HDMI connector on our DM 800HDse. Scart connector works without problems. Have reinstalled BH 1.4 but HDMI is still not working. Scart works. Any idea?
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#3942 - 12/03/15 11:20 PM
Re: HDMI failure
[Re: Mipp]
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VIPF Japhar
enthusiast
Registered: 03/08/15
Posts: 218
Loc: Netherlands
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Sorry to say but from my experiences.. 50% A cpu failure, mostly only to repair with a new cpu. 35% Related to the cpu, but then a print track or bad solder track from the cpu. 10% Hdmi cable, or issue with the tv hdmi connector. 2% Software related. 1% One of the diodes, D600/D601/D602 1% Hdmi connector failure. 1% Other unknown cause. But mostly it is the cpu, and mostly fixed after a new cpu. For more information, see this topic for a schematic. Dm800se Hdmi information
_________________________
Doing nothing leads to nothing. ------------- Please note, for technical support ------------- Will be given here, or on the jb8a8f8 forum and I prefer it in English. Johnny B. Click on the banner if you like to go there..
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#25466 - 09/10/24 08:36 PM
Re: HDMI failure
[Re: Mipp]
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stranger
Registered: 08/01/16
Posts: 10
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Hi, I have a strange behaviour my hdmi output.
The hdmi output is ok at boot as I see clearly the bootlogo, but during the booting the hdmi signal seems to go away as I see "no hdmi input" on my tv screen. I have no Hdmi output also when the booting is ended. I have also flashed another image with same results. The scart output works fine. Any suggestion to solve this issue ?
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#25469 - 09/13/24 02:19 PM
Re: HDMI failure
[Re: Admin]
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stranger
Registered: 08/01/16
Posts: 10
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Hi, thanks for the reply. I'm more than sure that my issue has nothing to do with resolution of the hdmi output.
This is because I have two Dm800se, and one has this problem and the other not. Just to be sure I have flashed a clean OpenATV 5.1 in both of them. On both of then I can see the bootlogo just aftew switching it on. I can see on the tv screen the setting options (Video output setup i.e. scart or Hdmi, etc. etc.) on the Dm800se that is ok at the end the booting process, while on the other one I can see the bootlogo on the tv screean when I switch it on, but as soon as the The linux kernel is booting the screen goes away and I got "no HDMI signal" on the tv screen. At the end of the booting process I can see the setup menu on the dm800se display but nothing on the TV.
I do not know how the hdmi signal out of the cpu is handled, but it is strange that i can see the logo at beginning of the boot and nothing after. If it is a cable issue or a Cpu issue I should not see anything since the beginning.
Something happens between the bootlogo display and the kernel linux booting that switches the hdmi off.
Should I try by replacing the TVS diods ? What else could be ? How to debug it ?
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#25473 - 09/15/24 05:19 PM
Re: HDMI failure
[Re: Mipp]
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stranger
Registered: 08/01/16
Posts: 10
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Hi, that is what I done.
I have flashed the same clean image to the two boxes. The one that has the hdmi ok showed the bootlogo immidiately after the switch one and the video configuration settings at the end of the booting process on the tv screen. The one that has the problem also shoed the bootlogo on the tv screen immideately after the switch on, but then "no HDMI signal" on the tv screem during the booting process- At the end of the booting process I can see the video configuration setting on the dreambox display but nothing on the tv screen.
so I'm 100% sure of a software/image that is exactly the same and has exactly the same configuration.
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#25474 - 09/18/24 11:13 AM
Re: HDMI failure
[Re: Mipp]
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Japhar Member
Carpal Tunnel
Registered: 10/21/10
Posts: 2647
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You tried both boxes with the same TV and same HDMI cable ?
TS
_________________________
DM8000, DM800se, DM500HD, DM800HD, DM7025, DM7020s, DM7000, DM500s VU+ Solo, VU+ Uno, VU+ Duo, Kathrein UFS910 Tivusat, TNTSat, Fransat, SSR/TSR, BBC1-2-3/ITV DE-OpenBlackHole 1.4 image : http://www.openblackhole.com/
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#25483 - 09/22/24 12:11 AM
Re: HDMI failure
[Re: Toysoft]
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stranger
Registered: 08/01/16
Posts: 10
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Hi , sorry for the late replay.
Yes I did test them on the same tv with the same hdmi cable
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