I have an L500-19Z running Windows 7. Up until yesterday the HDMI output socket was working fine.
However, now, when I plug a cable in the screen keeps goes blank and then returning to normal.
This continues for a few minutes and then when I try to output to eg a TV it shows as not connected.
Does anyone have any thoughts on what might be causing this?
Device Manager says that the device is working OK and I've checked that the driver is up to date.
I'm now stumped!
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To set BIOS to default you have to access the BIOS (press F2 while booting).
In BIOS you have to press F9 (I guess but at the bottom of the BIOS page you can find the description what button is needed).
Save the changes and reboot again.
If FN buttons does not work, then you should reinstall the VAP and Flash Card Utility again.
Also the display driver update might be useful.
Since we last spoke I've had to re-install Windows because of another problem I had but it hasn't resolved the HDMI issue. I suppose it's possible that it may be a TV fault but as my laptop screen flashes on, and off, when the cable is inserted I'm inclined to believe that it's still a laptop issue. I can only think that it must be some kind of hardware issue.
To be honest I have no idea why this is not working in your case…. In my case the procedure was very easy; connect TV and notebook with an good quality HDMI cable.
Choose the right channel on TV which belongs to the HDMI port of the TV.
Then power up the notebook. After that use FN + FN 5 in order to switch to external output. Note; you will need to press this several times to get HDMI as video output.