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Dell Latitude 5420 wont turn on when charger is connected
I have Latitude 5420 that it's working fine on battery but when it's plugged on USB C charger it wont turn on.
Battery is charging fine. Also, if I connect the charger while laptop is on, everything is fine, it will charge.
The same thing if I connect to other USB C port.
Charger is OEM
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Asus ROG Zephyrus G14 GA401QM
All voltages are fine and laptop is starting but the screen is black, fans are spinning after couple seconds (probably when cpu and gpu get hot), caps lock led not responding and battery is charging.
Everything is pointing on BIOS problem.
Can someone check if my bios is fine or should be repaired?
It’s AMD so there is no possibility to clean me region....
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Re: dell latitude 5490 bios
I also have bios that takes 30-40 sec to boot.
ST: 120YVT2
Model: Latitude 5490
Can someone help me?...
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Re: latitude 5420 bord LA-k491P bios problem.
Tnx but its still the same problem.
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Re: latitude 5420 bord LA-k491P bios problem.
Hi all. I need help, I have the same problem
Laptop wont start. Black screen, keyboard have backlight, capslock no respond, display test is working.
Device: Laptop
Brand: DELL
Model: Dell Latitude 5420
Service Tag: JDV76G3
Board number: GDF40 LA-K491P | Rev:3.0 (A02)
IC: XM25RH256C...
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Trekstor Primebook U13b bios
Here is a working BIOS for Trekstor Primebook U13b...
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Re: Boards with EtronTech EJ898H
QFN - 60 and shipping is $39.21
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Boards with EtronTech EJ898H
I need to replace ej898h but I cannot find anywhere. To order from AliExpress, shipping is 40$.
So, does anybody know motherboards with that chip so I can find them locally and use for donor?
Or if there is any compatible replacement ic?
Thank you
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Re: Trekstor Primebook U13b bios needed
The same problem. When i pres power button the pwr led just flash once.
(also 3v3 is present only when the pwr led flashes once)
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Re: Trekstor Primebook U13b bios needed
Interesting thing that i noted. If i desolder BIOS and put in programmer it reads just fine.
But if i try to read BIOS directly from mother board with clamps (also i checked and clamps are making a good contact with all 8 pins) it reads wrong like the file that i sent you first time.
Could it be that BIOS is ok but something is "killing" it and because of that i get false reading?
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Re: Trekstor Primebook U13b bios needed
Here is harder
Sorry i had bad pin connection to programmer...
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Re: Trekstor Primebook U13b bios needed
Here is bios backup...
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Re: Trekstor Primebook U13b bios needed
Ok. I found the bios chip. It's GD25LB64C...
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Re: Trekstor Primebook U13b bios needed
Here is the backup of that...
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Trekstor Primebook U13b bios needed
I need dump of Trekstor Primebook U13b bios.
It uses ic MX25L4006E with AMI bios
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Re: Primebook U13 keyboard pin 2v
After replacing keyboard and trackpad the laptop is working just fine.
Although, i still have 2v on keyboard high pins.
Thank you all for helping on this.
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Re: Primebook U13 keyboard pin 2v
I saw that he sent me for P13 so i choose and download for U13b.
Also i uninstalled the old one before installing...
I order a new trackpad and keyboard, and i will try them today to see is it keyboard problem or IT8987e or something else......
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