Aller au contenu principal

Réparez vos affaires

Droit à la réparation


The Latitude E7440 is an ultrabook by Dell released in November 2013, identified by model number 730-6964, with a fully usable touchscreen display. It is a high end business laptop built to be portable and sleek yet sturdy.

Questions au sujet de 12 Voir tout

Black screen on boot, no backlight BIOS reports “unknown panel”

I’m having a problem with the screen, it never turns on, the last time it was on it went blank white(which is also what it does when I try to run the lcd built-in-self-test), then never came on again, the bios says “unknown panel” I’ve replaced the screen cable but it still doesn’t turn on, and the bios still says “unknown panel”, could the panel have failed?

Répondre à cette question J'ai le même problème

Cette question est-elle utile ?

Indice 0
Ajouter un commentaire

1 solution

If BIOS is not recognizing the LCD panel, perhaps flashing the BIOS to update it will help.

Also, is BIOS giving any “beep codes” when you first turn your computer on?

Cette réponse a-t-elle été utile ?

Indice 0


I’ve already tried this, and it made no difference, no it functions normally other than the screen not working, thanks for the help though


Ajouter un commentaire

Ajouter une réponse

Isaiah Hollingworth sera éternellement reconnaissant.
Afficher les statistiques:

Dernières 24 heures : 0

7 derniers jours : 2

30 derniers jours : 6

Total : 342