Hi friends,
firstly, I have to let you know, I am not working with DELL laptops often ( actually, I can't remember, if I was fixing some board issue on DELLs ). And now I got for repair one from my friend. He bought it as a not properly working one, and its history is almost unknown. The issue is, it can not boot. This is not important in this situation.
Now, let me clarify the confusion in the topic name - the friend claims, that the model is Precission 5540. And when I get into BIOS settings, I can see the service tag CMR4533, which indicates he is right. But during booting, there is a label on the bottom on the screen XPS 15 7590, and the service tag on the backplate chassis is J14NXY2, which indicates, the model is XPS 15 7590. The board number is EDP51/EDB51 LA-H331P Rev 1.0 ( A00) and if I google for motherboard pictures of both models, they share the same motherboard.
So the question is - how can I be 100% sure, which model it is? Maybe the previous owner changed board, or tried to do something with bios firmware, and flashed there the wrong one. Or maybe I am to lame in DELL laptops, and the models equal. I have to firstly figure out, which model it is in order to flash there a new, proper bios.
Thank you for any hints.
firstly, I have to let you know, I am not working with DELL laptops often ( actually, I can't remember, if I was fixing some board issue on DELLs ). And now I got for repair one from my friend. He bought it as a not properly working one, and its history is almost unknown. The issue is, it can not boot. This is not important in this situation.
Now, let me clarify the confusion in the topic name - the friend claims, that the model is Precission 5540. And when I get into BIOS settings, I can see the service tag CMR4533, which indicates he is right. But during booting, there is a label on the bottom on the screen XPS 15 7590, and the service tag on the backplate chassis is J14NXY2, which indicates, the model is XPS 15 7590. The board number is EDP51/EDB51 LA-H331P Rev 1.0 ( A00) and if I google for motherboard pictures of both models, they share the same motherboard.
So the question is - how can I be 100% sure, which model it is? Maybe the previous owner changed board, or tried to do something with bios firmware, and flashed there the wrong one. Or maybe I am to lame in DELL laptops, and the models equal. I have to firstly figure out, which model it is in order to flash there a new, proper bios.
Thank you for any hints.
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