That sounds great!
Well i switched out the voltage regulator and now the voltage is correct and everything but the chip still won't communicate correctly. I get a device on address 0x08 and 0x70 and 0x71 (which seems to be the default addresses for the chip) but it doesn't have a proper device ID or product ID. So I guess either the chip is broken (again.. ðŸ˜..) or its a chinese fake chip...I don't know if I can switch it out with another one again since the board is pretty damaged on its socket and it was a hell of work to get every pin connected on the current one (including fixing pins...
C0dR
Member
Last Activity: 04-13-2025, 04:23 PM
Joined: 09-29-2023
Location: Berlin
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Oh well, the ride goes on. So I managed to get my hands on a working mainboard and tried to readout the chip as I need the programming for it anyways. After some struggle I managed to read out the chip! So for anyone having this problem: Don't use an external power supply, that did not work for me, I had to power the mainboard via ATX and then turn on the power with the power switch. For that I had to put in a CPU but NO ram, so the mainboard won't turn on fully, just enough to turn on the ASP1405I, otherwise it does not get 3.3V. So now I have the programming of the ASP1405 for Crosshair VIII...Leave a comment:
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oh well, I see, so maybe thats my problem. There is no dedicated header on my board (Asus Crosshair VIII hero). It seems the chip is connected to a SMBus with many additional devices and DACs.
Maybe I should try to disconnect the bus? But as the chip can talk both SMBus and I2C how to tell to use I2C?...Leave a comment:
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well I found the error, I had a small short between Data and CLK line, after removing it I got normal results. But still have some problems. If I use the I2C Adress scan I find 3 devices (0x08, 0x70, 0x71) but all of them just say UNKNOWN. I tried adding the device manually but it just says "wrong device" and I can't get it to detect the chip correctly. Any advice?Leave a comment:
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I also got me a USB005 Adapter but I really have problems getting it to talk to the chip. All I get is "usb error" or the software just freezes.
Were you able to read/write to the chip while soldered in or did you have to unsolder it first?
Did you just power the whole board or have you added a seperate 3.3V supply?
On my board the i2c pins seem to be connected to the superIO chip, might this make some problems?...Leave a comment:
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Looks good! Do you have a link or name for the product?...Leave a comment:
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Looks like there is an option to readout a functioning chip. It seems that some of the chips (including IR35201) is locked out without a license but I managed to patch the program to allow me to use the chip anyways. So all I now need is the USB005 device and a functioning mainboard. I guess there is no chance in using a different USB-I2C adapter?...
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Oh well, seems like I am in the same boat now. I guess nothing new on this side? I also wonder why there are virgin chips on the market, but I guess its for using it in own projects or something?Leave a comment:
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ohhh ok I see. well that explains why it does nothing. So it seems I am very much screwed unless I find a defective board or ASUS sends over the profile...â˜Leave a comment:
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Asus Crosshair VIII Hero no VCPU, Error Code 00
I am currently working on my[B] Crosshair VIII Hero[/B] mainboard on which a GPU short occured after which the mainboard would not turn on again. I suspected the VRM Controller (IR35201) and soldered it off. After that the board turned on again, obviously without providing voltage to CPU etc. I soldered a new IR35201 on it but it seems like the board still don't want to boot correctly. LEDs etc. turn on normally and after I press start button the power supply turns on fully and stays on, so I guess no shorts. Also nothing gets really hot. The error code shows [B]code 00 and I measured VCPU and... -
Sorry, it was the wrong file. This one is for Crosshair VIII Hero (WIFI)....Leave a comment:
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OK Guys, I bought some boardviews. Its not exactly the same board (wifi version) but at least it's kind of similar....Leave a comment:
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Can you check the CPU and RAM Voltages when its turned on?Leave a comment:
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ASUS ROG Crosshair VIII Hero Schematics
Hello,
I am currently trying to repair my own mainboard ASUS ROG Crosshair VIII Hero with a defective Power regulator chip. I have already soldered off the Chip (ASP1405 / IR35201) on the backside of the mainboard but during that process i knocked off some of the resistors around it and now my problem is I don't know what resistor goes where. Does anyone has the Schematics of that board or at least of the area around the chip (I have found images of it [url]https://www.techpowerup.com/review/asus-rog-crosshair-viii-hero-wifi/images/pwmcontrol.jpg[/url]) but there are no values written... -
Re: New Members - please post your introductions here
Hello Fellow Technicians,
I am C0dR and currently getting my fingers in mainboard repairs. I found this forum very useful so far and wanted to thank you all for all the information you provide here
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