GGEZ
New Member
Last Activity: 04-29-2025, 05:14 AM
Joined: 11-10-2020
Location: Westland
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Hi. My goal is to fix laptops and to learn valuable intel from the great and noble helpers on this forum. A heartfelt thanks in advance for all the help.... -
I have seen some videos from "Laptop Repair School" on YouTube that the CPU intel Intergrated graphics will boot before the big GPU takes over. So technically i should have a boot screen and since I'm not even getting an image at post, I'm starting to think that this could possibly some other issue than GPU. Maybe BIOS? Is it possible to probe for a "ALL_SYS_PWRGOOD" type of signal I could do for Lenovo laptops?...Leave a comment:
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Multimeter is beeping on both sides. Interesting that voltage can only be measured on one side. Learning something every day!
Resistance to GND on all coils are just 0.3-/.4 OHMS....Leave a comment:
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Hi.Thank you for the reply.
Yes im getting .75v from coils. and 1.25V on VRAM
Im only getting voltage on one side of the coils. is that normal?
[ATTACH=JSON]{"data-align":"none","data-size":"full","title":"image.png","data-attachmentid":3333368}[/ATTACH]Hi.Thank you for the reply.
Yes im getting .75v from coils. and 1.25V on VRAM
Im only getting voltage on one side of the coils. is that normal?
[ATTACH=JSON]{"data-align":"none","data...Leave a comment:
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16IAH7H minor liquid damage around GPU buck. boardiew and schematic included.
[B]Hi. I have a lenovo 16IAH7H (NM-E231)[/B] [B]with a small amount of water spilled on the RT8816CGQWGPU buck converter. When powering on, keyboard lights up, fans will spin slowly. CPU and GPU are getting hot. No image. Not via HDMI either. [/B]
[B]Part number is PU4001. The liquid spillage looked minor so I cleaned it up with some alcohol and cleaned ups some crusty joints with solder and flux.[/B]
[B]BoardView and schematic is provided. The buck converter diagram is on PAGE 107.[/B]
[B]I'm inquiring about any troubleshooting tips like probe points...
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