Plasma screen not displaying bios

413x

413x

413x

Caporegime
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Since changing my gpu in my Htpc my plasma tv no longer displays anything before the login screen (the windows loading dorsn't appear either)

This became an annoyance this morning when I had an error and had to drag my desktop monitor into the living room to sort it out

I don't know if it's a resolution issue or something. There is an av receiver connected between the tv and htpc
All hdmi
 
Could you try connecting the HDMI direct to the TV or try using a VGA cable to see if it helps?

Does it also change anything depending on whether its a cold boot or a restart from windows?
 
I will try that and illiminate the amp

Yeah no display irrespective of restart or cold boot
 
I have my PC connected to plasma via HDMI and to 24" LCD via DVI, and stuff before windows also only appears on the LCD. Plasma says no signal until PC gets into Windows.
 
Paul_cz said:
I have my PC connected to plasma via HDMI and to 24" LCD via DVI, and stuff before windows also only appears on the LCD. Plasma says no signal until PC gets into Windows.
Click to expand...

Can I ask what gpu it is?

I'm using an amd 7850. It's possible it's a 7xxx issue from little info I found
 
You'll need to use VGA/DVI or a DVI>HDMI adaptor. This is just how it is with some GPU's, if you had onboard video you could check the BIOS and set HDMI as the default/first output which may do it.

And though it's not your issue I'll mention that some displays won't accept low res HDMI inputs.
 
AbsenceJam said:
You'll need to use VGA/DVI or a DVI>HDMI adaptor. This is just how it is problem some GPU's, if you had onboard video you could check the BIOS and set HDMI as the default/first output which may do it.

And though it's not your issue I'll mention that some displays won't accept low res HDMI inputs.
Click to expand...

I guess I would have to connect the dvi to a spare hdmi input on my amp and just use this if i have a problem
 
I have same thing since changing from nvidia to amd I no longer have a picture in my bios :(

The card is putting out some stupidly low hdmi resolution that my panasonic doesn't do.

I have tried reflashing bios and changing settings nothing has worked so if you do find a solution please let me know.

To me this has been the biggest let down of changing to AMD everything else has been great and really can't understand why there default hdmi resolution is so low on the 7 series.
 
imginy said:
I have same thing since changing from nvidia to amd I no longer have a picture in my bios :(

The card is putting out some stupidly low hdmi resolution that my panasonic doesn't do.

I have tried reflashing bios and changing settings nothing has worked so if you do find a solution please let me know.

To me this has been the biggest let down of changing to AMD everything else has been great and really can't understand why there default hdmi resolution is so low on the 7 series.
Click to expand...

Well it sounds like the AMD GPU is actually using the correct resolution, your display is at fault for not supporting it.
 
I take it this is hdmi as well?
This wasn't an issue with 6xxx cards
 
Last edited:
AbsenceJam said:
Well it sounds like the AMD GPU is actually using the correct resolution, your display is at fault for not supporting it.
Click to expand...

It's not the display's fault that it doesn't support 540x480 over hdmi (High-Definition Multimedia Interface).


al4x said:
I take it this is hdmi as well?
This wasn't an issue with 6xxx cards
Click to expand...

Nah wasn't an issues with the 6 series they ran at 720p by default.
 
Lowest resolutions HDMI will support are 720x480i (interlaced) and 640x480p (progressive). Previous generations of Panasonic flatscreens comply with this and supported these over HDMI. But that isn't the issue.

The Bios screen is generally a bit lower resolution unless it has been tweaked. So it's the Bios screen not being at or above 480p that's the problem. If the TV has a VGA input and it supprts sub-640p resolutions then that's one answer. Alternatives would be either a PC monitor for the odd occasion the bios needs a tweak. Or changing the graphics to something that allows a minimum of 640p for bios over HDMI.
 
Maybe I have a gap in my knowledge but the only difference between when it worked and when it didn't is the gpu type
I thought I'd it was a bios controlled issue this wouldn't make a difference?
 
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