I am in shock! (for good, that is, in a positive way). I would never have imagined that the LED would stay on when connecting an external monitor. I connect an external monitor when I see a dim and diffuse image (helped with the flashlight), that is, without backlighting and then I focus my failure analysis on the motherboard and also on the T-Con attached to the panel to check all the SMD components very close to the LVDS signal cable. Does the Super I/O IC detect that there is no display device (as a load) and stop the startup of the machine, in this case two from the manufacturer Dell? From what we see here: That's how it seems to be! I definitely learned something I had no idea about today. Thank you very much for your time and sharing. All the best.
This is true, but in this case you will get a orange/white flashing error code on the LED rather than the symptoms observed here. At least in my experience...
@therepairshare673 Awesome 👌 Sometimes, it's the little things we miss, and we all do it! I can highly recommend getting a couple of the CMIzapper tools; Specifically the Chipmunk (both the USB tester and the HDMI tester). Having the USB tester can often tell you very quickly what's going on with a board, without having to do aything but plugging it in to USB port and pressing power button. I haven't bought both the USB-A and USB-C, only the latest USB-A (because I "tidied away" my original; I just use a USC-C -> USB-A adapter
Outstanding 🎉
Thanks for the update. I really don't know this tip.
I am in shock! (for good, that is, in a positive way). I would never have imagined that the LED would stay on when connecting an external monitor.
I connect an external monitor when I see a dim and diffuse image (helped with the flashlight), that is, without backlighting and then I focus my failure analysis on the motherboard and also on the T-Con attached to the panel to check all the SMD components very close to the LVDS signal cable.
Does the Super I/O IC detect that there is no display device (as a load) and stop the startup of the machine, in this case two from the manufacturer Dell? From what we see here: That's how it seems to be!
I definitely learned something I had no idea about today.
Thank you very much for your time and sharing. All the best.
Many dell laptops actually need a laptop screen connected to the lvds cable to post.Even a broken one,even the scalar board,without the lcd screen.
This is true, but in this case you will get a orange/white flashing error code on the LED rather than the symptoms observed here. At least in my experience...
@ianba123 True.However even after the bios reflash,you might wonder what did went wrong,only because you didn't connect even a crappy 30pin lcd.
@therepairshare673 Awesome 👌 Sometimes, it's the little things we miss, and we all do it! I can highly recommend getting a couple of the CMIzapper tools; Specifically the Chipmunk (both the USB tester and the HDMI tester). Having the USB tester can often tell you very quickly what's going on with a board, without having to do aything but plugging it in to USB port and pressing power button. I haven't bought both the USB-A and USB-C, only the latest USB-A (because I "tidied away" my original; I just use a USC-C -> USB-A adapter