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Re: Hp 15-cs2023ca USB 2.0 not working
The soc that is responsible for the usb state machine uses a 24mhz reference crystal. Locate it with the keyword 'xtal' in the schematic.
Then measure the operation with an oscilloscope to see if it is oscillating. A defective crystal or a crystal with the wrong frequency will make the usb engine appear faulty.
If available, replace the part for a quick test. Do not lose the original part(s).
The scope should measure 24mhz and oscillate with a sine wave.
There is also a local clock crystal of 32.768khz value. If the clock settings are stable and the clock is accurate, likely this 32.768khz is ok.Comment
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Re: Hp 15-cs2023ca USB 2.0 not working
Also confirm the resistors linked to the USB operation with this SOC.
See attached.Attached FilesComment
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Re: Hp 15-cs2023ca USB 2.0 not working
mon2 thanks for the info... My dear do you have the schematics for this board or you have just posted generic photos of any random schematics with this SOC???? Kindly info me, troubleshooting will be much easier for me. & I have so many of the 24Mhz crystals, I can just replace it with a new good one.Comment
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Re: Hp 15-cs2023ca USB 2.0 not working
It is from the posting made here:
https://www.badcaps.net/forum/showthread.php?t=102818
which I am assuming is close to your logic board - perhaps not 100%.
Either way, it is a crystal so search for a shiny metallic component on your logic board or post pics of this area. It should be either stamped with '24' or silk screened with the same to denote the frequency.Comment
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Re: Hp 15-cs2023ca USB 2.0 not working
Much appreciated mon2., will do so later & will inform you. ThanksComment
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Re: Hp 15-cs2023ca USB 2.0 not working
mon2, I am expecting this is the correct crystal 24MHz, I will replace it with a brand new one.. ThnaksAttached FilesComment
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Re: Hp 15-cs2023ca USB 2.0 not working
Yes. It only a suggestion since you have lost a block of usb ports.
From a distance, the crystal package appears to be 3225 but check with a micrometer. 3.2*2.5 mm ?Comment
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Re: Hp 15-cs2023ca USB 2.0 not working
Mon2, I got the exact replacement, but it was a knowledgeable try... Did not work at all. Same problem. I think mcplslg123 is right, it's the SOC which is defective & I should not be wasting more time on it. It's not only the USBs, but also the SD card Reader & the camera do not work. I am going for a new motherboard. Thanks for everyone's effort, I appreciate all your help.Comment
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Hello guys. I have a problem with a PNY XLR8 GAMING RTX3090 graphics card. The problem is that it displays and works fine, but the fans don't spin at all. The problem occurred when someone else removed the fans in order to clean it and broke one of the fan connectors. He replaced it himself and after that, it wasn't working anymore. I guess he damaged something else in the process. What i have done so far: I found 2 capacitors next to the connector that were in a bad shape, he must have touched them with his tools - they weren't shorted, but i replaced them with similar ones from a similar card....04-12-2024, 06:54 AM -
I have a customer machine on my bench right now that's stumped all the techs, so I decided to come here for help.
The specs are:
MPG Z590 Gaming Carbon Wi-Fi (MS-7D06)
Intel core i9-10900kf
2x16gb Corsair Vengeance kit
BIOS ver is E7D06IMS.1B0, from 6/12/2023
The machine was brought in because it would not POST after a GPU upgrade from a GTX 1030 to an RTX 3070. The customer also brought in the original GTX 1030, as well as a GTX 1060 that the machine also wouldn't POST with.
I tested the 1060 and 3070 on my bench (ASRock X570 Phantom Gaming... -
Hi there,
I am looking for help with my broken 980ti. Had a bad DrMos (the bottom one) and replaced it, card worked for a short moment, but I got another shortes DrMos (second one) and replaced that one aswell.
Now I don't measure any shorts, I have 12v, PEX, 5v, 3.3v all working fine (probing points on card), but I can't get any voltage at FBVDDQ or NVVDD probing points.
Where could I check to find the fault?
You think my first DrMos could be bad, because I read that the first one will activate core?
Don't want to replace that one when I can just test other...05-11-2024, 10:41 AM -
Hey folks, I have this iPad Pro 12,9" 4Gen A2232 here with no charging issue. The main fault was a crossed pins / faulty USB charging port due a bad cable.
So I started to replace this parts:
- replaced usb-c port -> no result
- replaced battery -> no result
- replaced usb-c chip CD3217B12A -> no result
- replaced 343S00326 -> no result
- replaced 343S00327 -> no result
- replaced 343S00328 -> no result
I have no more ideas for this issue. There is no short on the whole board, and the iPad is working fine... -
Hi everyone,
I have a MacBook Pro A1989 that was likely exposed to liquid. It doesn't display an image on the built-in screen, but the screen is backlit (you can't see the Apple logo or any other elements when held up to light). The laptop provides 20V and 1.5-2A, and it works fine when I use it with an external monitor. Currently, the connector for the display (J8500) is disconnected. I'm writing to ask for help in diagnosing the issue. I've heard that when the J8500 is exposed to liquid, the processor pin responsible for the display might short-circuit, and I'd like to know...
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