A bus is defined as one where at least one of its signals is bidirectional (e.g. I2C, 3 wire (Select, Data IN/OUT, Clock) SPI) and an interface is where all signals are unidirectional (e.g. 4 wire SPI (Select, Data IN, Data OUT, Clock); however, certain devices can switch from a bus to an interface and vice versa e.g. Secure Digital (SD) card and certain SPI devices.
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Thanks for any help. The board version is DAZAARMB6E0 REV: E. The bios chip is winbond 25Q64JVSIQ1736. W25Q64JV is not available in AsProgrammer -- only BV CV FV or FW_1.8c. The chip won't interface with asProgrammer and a CH341A. When I have this chip on the board, the laptop will not post but when I plug it in to power, the blue LED lights up, also the orange when the battery is connected. When I push the power on button, keyboard backlight turns on and the fan starts briefely then turns off. But I can't do anything to program this bios chip so I bought another one.
The BIOS... -
I have a Steinberg UR44 audio interface that I had in storage for a few years, and now that I want to use it doesn't power on. I want to take this opportunity to learn electronics repair so I am trying to repair it for learning experience.
I am looking for guidance on how to proceed with troubleshooting the problem.
I have checked the original power supply with a multi meter and it works.
I visually inspected the PCB board and don't see any issues, except what looks like a possible broken fuse but not sure. I checked it for continuity it reads 97 ohms, but... -
Hi everyone,
I'm currently working on repairing a Yatour YT-M06 multimedia interface (used with Pioneer head units). I'm looking for the firmware or schematic diagram to troubleshoot the board, as it's currently unresponsive.
If anyone has any documentation, tips, or experience with this specific unit, I'd appreciate any help!
Thanks in advance,
Eduardo (from Brazil)07-09-2025, 11:57 PM -
I need to find out schematics diagram of Steinberg UR 12., pcb printed these numbers YAMAHA YF989 ZM60700, I searched everywhere but I didn't find the schematics of this USB audio interface, If anyone has it please let me know and if anyone has similar schematics diagram please let me know as well.
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I have an HP gaming 15-0013dx laptop , motherboard quanta G3HA with AMD Ryzen 5 cpu and Nvidia discrete grsphics card. The laptop turns on and u can see the screen polarizing on and off in a loop but no video signal. All voltages are ok measured and stable (I checked all with oscilloscope). This schematics don't have power sequence but I'm using a similar sequence from another laptop with AMD CPU and I get all to the point CPU must release apu_pwrok and apu_rst#, this signal comes valid only for the period of time the screen is polarized and they disappear and same loop behaviour (active/inactive)....