Lovely! Thank you very much!!!
Didn't know about markingcodes.com 😀
but for anyone else having similar problems... Check out these sites aswell:
https://smd.yooneed.one/
https://www.s-manuals.com/smd/...
Nikan.e
Member
Last Activity: 03-03-2026, 10:00 PM
Joined: 11-24-2023
Location: Cologne
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Mainboard Buck-Converter marked "CPJ"
Greetings and Salutations,
After a short between 12v, 5v and GND, I had quite a few Parts to change on this Board. Now only one more rail is missing. It is the one that powers the ram aswell as feeding the drain of an N-Channel MOSFET, which powers the chipset.
The Mainboard is a Fujitsu D3230-A11 GS1
The driver is marked with CPJ, you can see in the Picture, that it is a QFN-12 Packaged IC.
That Ic is drving a dual N-channel MOSFET in a halfbridge configuration.
I know the Board is pretty old, but I am really attached to it, + it is the... -
try booting with the card plugged in but with integrated-GPU hdmi connected. Check if the card is detected. If so:- Some older cards like the GTS 450 may have issues with newer UEFI-only BIOS systems.
- If the H410M BIOS supports CSM (Compatibility Support Module) or Legacy Boot, enable that in the BIOS if the card doesn't show display output right away.
- Since the GTS 450 is a very old GPU (2010 era), driver support is limited.
- You'll likely need to install legacy NVIDIA drivers i think something like (version 342.xx) manually on modern OSes.
Leave a comment:
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Looks to me like a bad GPU core — could be faulty RAM, but the GPU core is more likely.
If the system has a dedicated GPU, try running MODs/MATs, or Tserver/dmgg.py.- If a bad RAM chip is detected, replace it.
- If the issue persists after replacement, you may have installed a faulty RAM module, soldered it improperly, or the GPU core itself is bad.
- If no bad RAM is found at all, then the GPU core is faulty.
If there's a dedicated GPU, you can disable it as a workaround.
If there's no dedicated GPU (i.e., it's integrated), then unfortunately, the only solution is to...Leave a comment:
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Inno 3d RTX2070 not detected - no I²C connection
Greetings and Salutations!
I have encountered a faulty GPU — an Inno3D RTX 2070 Twin. There was a shorted MOSFET on the Vcore rail.
The faulty DrMOS was removed, and the burned PCB area was milled away.
All voltages are now good, but the GPU is not being detected.
I found that the CS pin of the BIOS (GPU) is not being pulled low, and thus, the GPU isn't detected.
I wanted to measure the SM_Data and SM_Clock, but to my surprise, there is no connection at all.
I thought these pins were used for communication during startup?!?
On all... -
I do not have the original adapter, but I have a very similar one from Dell.
No flash is being powered, except for the UT2, which is connected to the TPS65982 USB-C controller....Leave a comment:
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Nonsens, the super IO is powerd by +3VALW, I do not know what I traced back on the pcb to write what I earlier postet....Leave a comment:
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My bad,
* +3VALW - present
* +5VALW - present
are turned on by the super-IO....Leave a comment:
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Alienware 13 R3 repair - power issue or bad super-IO?
Greetings and Salutations!
I have BAP00 board in front of me, which does not want to turn on. Nothing except for the AC power is connected.
+3VLP - present
RTC power - present // no battery connected
* +3VALW - present
* +5VALW - present
* +LAN_IO - 0.00V
* +3V_PCH - 0.05V
* +1VALW - 0.00V
* +1V_PCH_PRIM - 0.00V // same rail as +1VALW
Note : ON* means that this power plane is ON only with AC power available, otherwise it is OFF
+1VALW - 47Ohms
+3V_PCH - MOhm range
+LAN_IO - 100KOhm... -
You are right, It seems to be a clone. By choosing the STM32G431RB MCU in J-Flash, I was able to dump the entire 512KB of flash from the working and not-working Nations chip. Unfortunately, it is not possible to flash the chip that way; an error always occurs, but it does not specifically indicate the type of error. It is unclear if this is due to the difference in internal flash sizes of the chips or if there is an ID mismatch, etc.
I will try the STM32CubeProg. Is there a settings file of supported chips if something has to be changed for the Nations chip to work?Leave a comment:
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How to program a specific flash region of a Nations N32G455RE MCU?
Greetings and salutations!
I have a device that uses an N32G455RE. Unfortunately, its flash got corrupted. I have a dump of a working chip.
How can I program a specific region of the flash or the whole flash without touching the RAM, option registers, etc.?
I do not have a J-Link debugger and won't buy one, as I am not rich.
I have flashed a Nucleo board with an ST-Link to a J-Link just to find out that the ST-J-Link only supports ST chips.
What would be the cheapest and easiest option to program the Nations chip's flash without touching registers etc.?... -
I was finally able to test it, but unfortunately, it did not work.
The trackpad does indeed function, and the haptic feedback works while the device is not in DFU mode.
- The trackpad was connected while trying to revive and also restore.
- A similar Mac, just with a different RAM/SSD configuration, was used.
- Different cables were tested, from Apple and other brands.
I always get an error saying the following:
"Gave up waiting for the device to transition from DFU state to DFU state. [com.apple.MobileDevice.MobileRestore - 0xFCA (4042)]"... -
Alright, Thank you very much!!! I'll try it as soon as I get the trackpad cable!Leave a comment:
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The configurator does not show anything at all when holding the t key while booting, but I am able to see it as an apple macintosh peripheral device.
Also, I do not get the boot chime. But DFU does show up, when using the debug jumper as well as the keyboard combination.Last edited by Nikan.e; 12-04-2023, 05:39 AM. -
I do not get any fan spin or a hiccup on the fan, not even when it is trying to revive/restore. Does the fan kick in even without the trackpad?
Wow, that is crazy. I really did not expect this, but well, what do I know? It's Apple after all...Leave a comment:
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DFU does indeed work; it shows up on a PC running a virtual machine - Sonoma, with the latest Apple Configurator installed.
However, the restore option does not complete. Could this be due to the virtual machine, or is it because the trackpad is missing?
The schematics also show that a sensor is located on the trackpad. Is that relevant for a restore, or does the software not check for the trackpad while trying to restore?
The voltage does go up to 20V but the current draw is very funky. It stays sometimes at 44mA, sometimes it goes up to 300mA, and sometimes it...Last edited by Nikan.e; 12-04-2023, 05:47 AM.Leave a comment:
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MacBook A1989 missing rails PP3V3_S5 and PP1V8_S5
Greetings and Salutations,
I have gotten an A1989 Macbook board number 820-00850-A which has two missing rails -> PP3V3_S5 and PP1V8_S5.
PBUS is at 12.6V every other voltage made by the PMIC is just fine.
Resistance to ground -> PP3V3_S5 ~ 220Ω
Resistance to ground -> PP1V8_S5 ~ 220Ω
PP1V8_S5 and PP3V3_S5 are not shorted together.
Voltages up to PP2V5_NAND_SSD0 seem to be fine.
Can anyone confirm if these resistances are normal for this board?
What could be causing this issue?
Is there a way to... -
MacBook A1989 repair / no CPU voltage no boot signs
Hello everyone.
I have recently obtained a MacBook Pro A1989 model with a touch bar and Apple ID. Unfortunately, it does not want to start up.
No CPU Voltage.
U7800 Does produce voltages.
T2 Chip warming up very very little.
I do have voltages like 1.8, 0.9, 3.3, 2.5 volts, etc., present. I did not find any short circuits. Unfortunately, the device has no touch ID/start button. So, I have used the debug jumper to put the device into DFU mode. - It is getting recognized as a Macintosh while not in DFU mode and as Apple (DFU) while in DFU mode.... -
greetings and salutations!Leave a comment:
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