No luck in attempting with an older Configurator on Ventura OS. Same USB timeout error. This makes sense since the CPU / PCH rail is not yet on. The PCH is the host USB controller.
Also have no VBUS on any of the USB ports yet 5v is enabled on the board. The local USB load switch is enabled by the PCH which is not yet powered.
If either of the fans is not properly seated inside the molex SMD connector, the local fan will spin at hyperspeed.
If yes, flux and carefully lift one leg of the part but only if you feel comfortable. Do not believe this is a fault but can double-check.
After you lift one leg -> allow this part to cool. Then test again while one leg remains on the board. The diode must block in the one direction (not boy band).
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Suspecting this to be an issue of the host and target OS not matching.
Tested with many known good USB cables - no difference.
Inspected the entire board - could not locate a fault. Have not (yet) inspected with a thermal camera but no shorted parts from the hours of debugging.
Can enter DFU mode with ease using the shorting PCB pads.
Will roll back the host machine OS and attempt again. We know so far that the target is NOT on Sonoma. About 6 months ago, we did have a client with a dead macbook who was on Sonoma so 'assumed' that the latest...
1) Check if any of the other mosfets on this charger IC is shorted / leaky. Are you sure that the PQ1900/1902 mosfets are being soldered in the correct orientation for pin # 1? They are 100% the same mosfet as the original? Share the part number of the mosfet(s) that are dying. Post pics of the reworked area for these replaced parts.
2) Confirm that the ISL88738 IC is soldered properly and without shorts.
3) If the battery does not charge, confirm the battery is not defective. This is a DELL so the PSID communication on the DCin power connector is very important. Attach...
[URL="https://logi.wiki/index.php/G3_to_S3_State_for_Ivy_Bridge_Haswell_and_Broadwell"]G3 to S3 State for Ivy Bridge Haswell and Broadwell - LogiWiki[/URL]Review this flowchart:
These load switches are not required unless you wish to use the USB port linked to this load switch. These parts act like circuit breakers for excessive current draw by the target USB widget (ie. toaster, coffee maker, etc.).
USB was only meant to power low power products by default but these days anything goes.
Have you also removed the other USB load switches? They are also suspects.
The company that claimed to be THE supplier to them was going under the 'Sunshine' brand. They had a huge 'Ampsentrix' backdrop and were very nervous when I mentioned MobileSentrix. Upon my return, the local branch stated that Sunshine is not their supplier.
Being a 'hazardous' category device, only select couriers can handle batteries from overseas. Keep this in mind but the vendor will know all of the details. We are reviewing assorted batteries for a home automation line of products and somewhat in the same boat. Considering to use iphone batteries since they are relatively low...
Share the topside markings of this flash IC. Then download the datasheet for this device and review the package that is onboard.
Check which pin is linked to this missing resistor. If the pin is a data line then most likely will be a 33 ohm resistor and is to stop ringing. If the pin is a status line then this could be a pull-up or pull-down resistor so ~10k ohms....
Return the batteries. They (MobileSentrix) will take them back.
Met far too many vendors in HK during my visit last October. DEJI is one that comes to mind that claims to be a high quality vendor. Not sure if they offer batteries for macbook but you can ask.
Ironically - met a few that claim they build the Ampsentrix brand for MobileSentrix but they do not....
I would consider to apply thin tape onto all backside of this LCD to prevent shorting. Be sure each of the shields are back onto the board like before. Appears that the main board stack may have faced a physical hit that killed the screen and perhaps removed the solder joint of an inductor or filter. Try to test with a piece of paper between this LCD and the main board stack. Cut the paper to shape and see if the phone still acts funny or not.
Remove all power. Measure the RESISTANCE (not diode mode) of each inductor (2 legged and usually grey in color) on the board. You are checking for a low resistance which may be due to a shorted capacitor onboard which will trigger the local power supply to shut off.
PS: I think I have one of the same units from when we did a design for HP.
What is the voltage of [B]PPBUS_G3H [/B]to ground? Is the voltage here stable?What is the voltage of [B]PPBUS_G3H [/B]to ground? Is the voltage here stable?What is the voltage of [B]PPBUS_G3H [/B]to ground? Is the voltage here stable?
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