Hello i finaly found out. Thank you for the help.
The First trouble was the Fuse no doubt about it, and the second trouble was the lcd itself the flex pcb is totaly dead.
Best regard
Blueskyfm
Member
Last Activity: 12-08-2023, 01:10 PM
Joined: 11-07-2023
Location: Paris
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Ok for the first test I have 0 ohms like you say. Interesting think I found the fuse F3 is blow again. I changed it again and now I have 8,80v on the JCAM1 but no change on the lcd. I think the lcd have a troubleLeave a comment:
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It was my fault i made a measure without the usb C cable plug.
now I found:
pin #2: 3,35v
pin# 3: 8,80v
pin# 4: 8,80v
fuse: 8,80v
on the Jcam1 socket I don’t find any voltage. I don’t understand why and if I need all the lcd cable plug on the motherboard to have a voltage. In the attachment I put the jcam1 picture...Leave a comment:
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On eatch pins#3 and 4 I have a 7,6 voltage. I will try to measure the values directly on the port of the screen itself. I don’t if this information can help but in the bios I can see the battery is in poor health condition.Leave a comment:
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8,9V for eatch side of the fuse F3
and 3,35V for the pin #2 on U22Leave a comment:
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XPS 7390 no backlight LA-H931P
Hello everyone. I picked up an XPS 7390 with a backlight problem. I was thinking of repairing it on my own but despite the wiring diagram at my disposal, I can't do it. Everything else work properly (webcam, touch screen,...) I know by the old owner that the backlight work on a other motherboard. Can a kind soul help me? I've already replaced the F3 fuse, which was broken. I've also noticed that diodes D5 and D13 on pin 1 have a voltage of 3.3V.
thank you in advance for your help... -
Re: Dell 7390 LA-H931P Boardview
Hello Thank you do you have the boardview for this motherboard ?Leave a comment:
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Dell 7390 LA-H931P Boardview
Hello
I am looking for the Boardview and Schematics for my Dell XPS 13 7390 2-in-1 Motherboard:
EDP35 LA-H931P
Rev: 1.0(A00)
2019-07-10
It is stuck on Dell Logo but I don’t have backlight , Keyboard lights working. If i plug a external monitor the computer boot properly without the backlight on the internal screen.
Any help would be greatly appreciated. -
Re: New Members - please post your introductions here
Hello fellow enthusiasts,
I'm excited to join this electronics assistance community, and I'd like to introduce myself. I'm based in the beautiful country of France and have a strong passion for electronics and computing. I've even taken on the challenge of assembling my own PCs in the past.
One of my unique hobbies is hunting for broken or faulty PCs on eBay and then reviving them through repairs. It's not only a cost-effective way to build a PC, but it's also incredibly rewarding to give these machines...Leave a comment:
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