Can anyone help me out with the schematic/boardview for this? I have a laptop that will not POST (POST card shows nothing). I was thinking of reflowing the GPU & CPU, but I'd rather try and check out the power rails. Also open to suggestions or any sort of help. Thanks. all of you rock!
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Re: qal70 la-7741p
I hope to helpDue to a lack of donations, server free space at a critical level, and possible closure of Bios Requests all donations are welcome, click:
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Re: qal70 la-7741p
la-7741p boardview required.Comment
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Re: qal70 la-7741p
BoardviewComment
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Re: qal70 la-7741p
thank you so muchComment
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Hello everyone,
This is my first post on the forum
I recently purchased a MacBook A2141 from a colleague at work, which had issues with the dedicated GPU. The system occasionally displayed artifacts on the screen and sometimes experienced kernel panics related to the GPU. Interestingly, applying pressure to the VRAM module would temporarily resolve the artifact issues, which made me optimistic about the ease of repair.
Board: 020-01700, Config: Intel i7, 512GB SSD, 16GB Ram.
Before completing the purchase, we decided to erase... -
I am looking at an A2337 and found this for the order of power rails and what they do. Can this be confirmed before I dive into hunting down power rails that do not exist or are not neccisary?
- PPBUS_G3H (12.6V-12.8V)
- This is the main power rail that supplies power to the entire system. Check this rail first, as it must be present for other power rails to work.
- PP3V42_G3H (3.42V)
- This power rail is derived from PPBUS_G3H and is used to power the SMC (System Management Controller) and other essential circuits. It should be present if PPBUS_G3H is working correctly.
- PPVRTC_G3H (3.3V)
- This
- PPBUS_G3H (12.6V-12.8V)
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Hello everyone,
I'm currently diagnosing a MacBook Pro A1707 motherboard that does not power on. I've gathered some data but am stuck and need expert advice.
Note that i'm a beginner in electronics and i'm trying to learn while trying to repair this macbook that my work gave me. I'm really curious and love understanding how thing works and i already learned so much.
Only one usb c port is taking 20v and have 12.5v on PPBUS_G3H. when trying other ports, 2 are not going to 20v and one is going to 20v but the CD3215 is getting really hot.
Observations... -
Hello there, does anyone have info about AMD Ryzen 5 7535hs power rails or an schematics from a compatible CPU?. I have a quanta G3PR from a HP victus laptop, I suspect cpu is damaged but I would like to know what power rail is the one I guess is damaged. There are 4 coils aprox 4.2 ohm to gnd in parallel next to CPU (I guess vcore) ,one coil same size next to those 4 around 0.7ohms to gnd (damaged rail I guess), and other two smaller I guess associated to less current power rails for CPU logic purposes. Anyone have more specific info? I attached picture. -
I have an older system which was built in the Windows 7 era and which has developed, I suspect, a power supply problem. The system had the same problem, random crashes, a couple of years ago, which I subsequently remedied with a new power supply.
The power supply which came with the machine is a no-name "Safe Power PE-300". It is SFX form factor and claims a high current capacity: +3.3V @ 22A and 5V @30A (the +12V rail claims a meager 16A). Problem is that SFX supplies (or even ATX supplies for that matter) having high current ratings on the 3.3V and 5V rails seem to be...
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