Does anyone have boardview and schematics for Dell Precision 3480 laptop?
Computer shows no signs of activity: 5V 0A is showing when the charger is plugged in. No means to test whether computer runs off the battery since the battery is currently dead.
No heat spots of any kind with the charger plugged in. No shorts that I can see. Both USB-C ports appear to be in great condition. TPS65994bf chip gets 5V but not switching on 20V.
Before I attempt to change the chip, perhaps other areas I can look in?
trepachka
Badcaps Veteran
Last Activity: 01-21-2025, 10:46 AM
Joined: 10-06-2022
Location: Vernon Hills
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Dell Precision 3480 boardview and schematics
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Hi, I have this XPS 12 9Q33 with system password. I am unable to get past it. Please, help me remove it.
Model: XPS 12 9Q33
Service Tag# GS4NF12
The BIOS file is attached to this message. Thank you.... -
Great to know. Thank youLeave a comment:
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In case this still interest you: I had a similar situation with this board. There was a small spill close to PU8. After cleaning the spill, the motherboard kept resetting every 5 seconds or so.
Check all sense resistors around PU8, make sure they all measure 2.2 ohms. In my case, one of the resistors connecting 5V line (pin 29) was showing mega ohms. So, I figured there was quite amount of current passed thru it to make it fry.
After replacing it, no change but 5V line going into PU8 was restored. I replaced PU8 from a donor board and the motherboard is kicking again.Leave a comment:
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LA-K461PLeave a comment:
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Dell XPS 9305 Schematics + Boardview
Hello, does anyone have schematics and boardview for Dell XPS 9305 notebook?
Computer comes with 3 charging ports and all of them are showing 5V/0A, zero activity on the motherboard. Computer runs off a charged battery. -
Great. So, it's a 3.3V step-down converter ("B" vs "C" at the end). It's not shorted but definitely messed up. I will see if I could get one purchased. Thanks.Leave a comment:
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I have this model in my hands right now. Thank you for very much for clear photos of the motherboard with voltage markings, by the way. Currently, the computer charges but does not post. When pressing the power button, it lights up briefly, then goes off. The motherboard does not have any shorts I can find. The 5V Always rail is present. However, the 3.3V Always rail is not present. Under the infrared camera, the chip responsible for it is the only bright spot on the motherboard. I do get 3.3V on many pins of the EC chip. But, I think this voltage is generated by auxilary rails.
Because...Leave a comment:
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I tried this new BIOS file and I am still getting the same response from the computer. I suspect RAM could be faulty. The 4th gen of Thinkpad E14/15 comes with soldered 8GB of RAM for both Intel and AMD processorsLeave a comment:
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I am using a genuine 230w lenovo charger. Computer behaves the same way on battery power alone.Leave a comment:
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Read my previous response. The conversion worked only when I managed to purchase a touchscreen computer with a broken screen. I took the motherboard out and placed it into the computer that we wanted to convert. Computer is now working as touchscreen. I do not recommend doing it since you spend more on it than just buying a factory made computer with touchscreen. It also took tremendous amount of time I could've spent on other projects.Leave a comment:
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Sorry, the serial number is PF498YGXLeave a comment:
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Upon reflashing the bios with the new bin, I am now getting a brief screen flash as well as those 4 keys briefly lighting up. Then, nothing. Computer is now drawing a little more amperage, around 0.64 vs. 0.59 beforeLeave a comment:
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The bios file you provided did make changes in the computer's behavior. As I mentioned before the changes, no keyboard lights. After the reflashing of the bios, computer attempts to boot with several keyboards keys flashing.Leave a comment:
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Hey, I applied the new BIOS. I can clearly see progress. Before the keyboard stayed dark. After applying the new BIOS, "Esc", "Caps Lock", "F1" and "F4" keys now briefly flash which is what I was expecting.
They are supposed to flash 2 more times before getting the image on the screen but that didn't happen.
Can you see whether you can make additional changes to the BIOS?Leave a comment:
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Apparently, HP makes numerous variations of this computer. Clearly, the motherboard I have would not support such conversion. I had purchased a touchscreen and a proper video cable but no go.
I would up purchasing a computer from a seller who had one with a broken touchscreen and a functioning motherboard. After a quick swap the conversion worked.Leave a comment:
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Thinkpad E15 Gen 4 AMD NM-E501 bios
Hello, I have a Thinkpad E15 Gen 4 laptop. It appears to be starting as I can hear the fan spin and the cpu gets properly hot. However, no video and no keyboard action on start
I suspect corrupted BIOS. Please, someone help me clean the BIOS image. Thank you
S/N: PF498YHX
Type: 21ED-003WUS... -
I replaced the EC chip without any change. When power button is pressed, only the power button lights up. Battery gets charged, no problems. I get 5V, 3.3V, 1.8V and 0.75V. No obvious hot spots on the boardLeave a comment:
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I removed the chip and the short is gone. I hard wired pins 1 and 5. No change. Fan speed is still showing 0 RPMLeave a comment:
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I am in a similar situtation: GS7612S5MA-R chip has gotten bad. It shows about 13 ohms on input. Did you ever figure out whether RT9193-33 IC chip worked in this circuit for you?Leave a comment:
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