[RESOLVED] How to blind recover from no HDMI output after bios edit

userHead Xboxclassic 2017-03-27 20:43:30 27637 Views15 Replies
1. Remove/Unplug all external Drives. (Except an external DVD-Rom if you have one connected !)
2. Power on Unit (If you have an external DVD-Rom Drive it will make a Spin-up noise indicating unit is on )
press escape a few times until numlock led/light on keyboard stops flashing.
---Still no screen - Relax you have already entered the bios mode even though you can not see anything yet !---
3. Press F3 key
4. Press Enter Key
5. Press F4 Key
6. Press Enter Key
2021-04-16 11:57:40
nightside180 wrote: ↑Thu Apr 15, 2021 6:32 pm I'm having the same issue right now. I flashed the bios for autoboot and since the first flashing it hasn't been able to display any video.
Your issue is different from that in this post. We suspect you have updated a wrong BIOS for your LattePanda. Pls contact techsupport@lattePanda.com for help.
userHeadPic LattePanda
2021-04-16 02:32:52 I'm having the same issue right now. I flashed the bios for autoboot and since the first flashing it hasn't been able to display any video. userHeadPic nightside180
2021-04-08 18:10:28 I'm also having this issue.

No output at all untill it boots into an OS...
The bios reset trick at the beginning of this thread did nothing

Have found a workaround in that i get video out if i plug in the Anker USB-C dock i got for my laptop: The HDMI output on that works fine

Though it would be nice to fix this, any ideas?
userHeadPic Failquail
2020-11-13 04:10:51
Xboxclassic wrote: ↑Mon Mar 27, 2017 12:43 pm
In addition to XBoxClassic's great advice. - Here comes the same trick for a similar problem:

In case you switched your lattepanda to "use build-in-display [that's display 1] only"
the HDMI-Output will disappear on booting windows. - LP just shows a black screeen.
Here's the solution :
Switch your LattePanda on and give it time to startup Windows completely.
Continue as follows. You won’t see what you do, but it works, though:
- Type your password
- Press Enter
- Press the Windows-Key plus he letter P
- Press the arrow-down-key once
- Hit Enter
And (by magic the window screen will appear again on your HDMI display.

Stefan
userHeadPic Stefan20
2020-05-02 12:46:27 So interesting find. I wasn't able to get hdmi output no matter what I did. But when I plugged it into a higher resolution then 1920x1080. And was able to see the boot and bios screen.

Hope this helps out.
userHeadPic Eli99k
2019-05-10 15:05:20 hi,
LattePanda 4/64 Z8300 Cpu
But that did not solve my problem.
The LattePanda still boots into Windows and I am flying blind 'til the Windows boot logo.

I'm having trouble, I'm getting an image through a 7 "LCD
but
I can't get an image from HDMI,
7 "LCD I removed the image on HDMI does not come unfortunately.
HDMI cable unplug / plug with HDMI working
userHeadPic ender
2018-12-18 04:50:38 Hi, I have misconfigured the BIOS of my LattePanda Alpha 864 in a way, that HDMI is not working until the OS (linux in my case) is started.

So I found this thread and unfortunately the [ESC..., F3, Enter, F4, Enter] sequence does not work for me. I'm quite sure I get into the BIOS by pressing either ESC or DEL, because after doing that I can wait forever and nothing happens (otherwise it boots into linux). When I press [F3, Enter, F4, Enter] it reboots as well as when I press [ctrl, alt, del].

Can someone please check and post the BIOS reset to defaults sequence for the LP Alpha 864 here please?!

I would like to get vision on boot back so badly.

As an alternative I've already tried to do a BIOS reset from within linux:

Code: Select all

modprobe nvram dd if=/dev/zero of=/dev/nvram But that did not solve my problem.
The LattePanda Alpha still boots into linux and I am flying blind 'til the linux boot logo.

In another thread someone describes a HARD RESET option and I think it does not apply to the Alpha (https://www.lattepanda.com/topic-f10t853.html). But if that's the way to go, please tell me which button I shall press for how long.

PS: I tried the HARD RESET option now as well with no visible result.
At first I was confused about how the Arduino reset button can be the one that is meant there, but as that and the power button are the only buttons on the board, I just tried with those.
userHeadPic birger.schmidt
2018-03-20 16:43:21 yeah, it's really helpful. Many thanks for our kindly members. userHeadPic LattePanda
2018-03-20 03:42:11 Thank You worked like a charm !! userHeadPic techre3825
2018-01-26 16:54:19 Hi Xboxclassic ,many thanks! This is really helpful! userHeadPic LattePanda
2018-01-25 23:33:10 Thanks for all the positive feedback from all users of the LP.
(Also the Moderators of the site)

Very Much Appreciated!

I am still working out how far you can actually Push the LP to where it is Stable and Fast.
Specifically with use for Gaming and Media in mind.

The default settings are perfect as they stand for most use.

Though I have Noticed a Few Games and Videos seem to Lag at times.
Hence the Push or Overclock if you will.

I can only do this in my spare time as other issues come first.
Will Let you all know in the very near future of Range to entered.!
Thanks Again

Xboxclassic !
.
userHeadPic Xboxclassic
2017-11-30 17:36:23 @Xboxclassic
Repaired some boards with no HDMI output. Many thanks.
userHeadPic LattePanda
2017-11-22 10:30:23 Really useful, thanks. i just fixed my problem follow this. userHeadPic Coco Xia
2017-09-18 16:57:28 LOL Useful!! userHeadPic Kellman616
2017-03-28 11:30:36 thanks for sharing, stickied! userHeadPic LattePanda