> For the complete documentation index, see [llms.txt](https://support.onlogic.com/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://support.onlogic.com/product-documentation/server-products/mc850-series/mc850-40-mc850-53-mc850-70.md).

# MC850-40 / MC850-53 / MC850-70

## <mark style="color:blue;">Technical Resources</mark>

### Internal Access

The case is very simple to open. To do so, remove the three screws from the back and slide the lid off towards the rear.

<img src="/files/4rHssCnKSWHrCmtixTHl" alt="" data-size="original">

***

## <mark style="color:blue;">MC850-40</mark>

{% embed url="<https://media.onlogic.com/248f8472-1b41-4a43-9f88-4aee598a9ac5/5fc0fba8-f4c2-4b62-8756-4c78bf78b3b5/jbdpUKKJTfoWZGvStF0ayMrqH/kxJsY6MpOU2gpxfQC6oJQx9Q1.pdf?targetFileName=OnLogic-MC850-40-SpecSheet-v1.pdf>" %}

### Motherboard

#### Manual, Drivers, Datasheet

Technical information related to the system's motherboard can be found from the support link below

{% embed url="<https://www.asrockrack.com/general/productdetail.asp?Model=X570D4I-2T#Download>" %}

### Startup Settings

#### Auto Power On

The auto power on feature will turn the server on automatically when AC power is connected or when power is restored after an outage.

1. Power on the server and press F2 a few times to access the BIOS
2. Navigate to the Advanced tab

<figure><img src="/files/IKiz99FFYY2PIAsHJN2g" alt=""><figcaption></figcaption></figure>

3. Open the Chipset Configuration menu
4. Locate the Restore AC Power Loss Option
5. Change it to 'Power On'

   <figure><img src="/files/QrF1Jf4agGuXh3lPFw14" alt=""><figcaption></figcaption></figure>
6. Press F10 to save & exit, and enter to confirm
7. Auto power on is now enabled

#### Clear CMOS

If the server fails to power on or is unresponsive, clearing the CMOS may help. It will also restore the BIOS to factory defaults. Ensure this procedure is done in a static safe environment. A grounding strap is recommended.

1. Locate the clear CMOS solder pads

<figure><img src="/files/dk5McQmrkd4duujJr87F" alt=""><figcaption></figcaption></figure>

2. Using a flathead screwdriver or similar conductive tool, short the two pins together for 30 seconds

<figure><img src="/files/hWkul7ucYXcXHNR4XHvX" alt=""><figcaption></figcaption></figure>

3. Slide the lid back on, reconnect the server, and power it on
4. It may reboot several times to re-detect hardware
5. If it continues to malfunction, contact technical support.

***

## <mark style="color:blue;">MC850-53</mark>

### Motherboard

#### Manual, Drivers, Datasheet

Technical information related to the system's motherboard can be found from the support link below.

As of 12/2025, all ML100G-53s will be shipping with either I225s or I226s NICs.  This will be true until we run out of stock of the I225 motherboards

{% embed url="<https://media.onlogic.com/248f8472-1b41-4a43-9f88-4aee598a9ac5/c152892c-1ebf-47d7-be52-9799afaecea3/d3f2JtHzzpitQrrdxuWYfapy6/6VqdGDzsQi22C8yxb38BMbYXh.pdf?targetFileName=OnLogic-MC850-53-SpecSheet-v1.pdf>" %}

{% embed url="<https://www.asrockind.com/en-gb/IMB-1210-L>" %}

### Startup Settings

#### Auto Power On

1. Take the jumper circled in blue and move it to the pins circled in orange

<figure><img src="/files/yMMu5PGkU0OXpz9hMNTb" alt=""><figcaption></figcaption></figure>

2. Auto power on is now enabled

**Note:** The blue jumper is for LVDS display output. As the MC850 does not use LVDS, we can borrow that jumper to enable the auto power on.

#### Clear CMOS

1. Locate the CLRMOS1 jumper

<figure><img src="/files/DCq8p9So2zA28SI7rJ5Q" alt=""><figcaption></figcaption></figure>

1. Move the jumper over by 1 pin
2. Wait 30 seconds
3. Restore the jumper to its original position
4. The CMOS is now clear

***

## <mark style="color:blue;">MC850-70</mark>

### Motherboard

#### Manual, Drivers, Datasheet

Technical information related to the system's motherboard can be found from the support link below.

As of 12/2025, all ML100G-53s will be shipping with either I225s or I226s NICs.  This will be true until we run out of stock of the I225 motherboards

{% embed url="<https://media.onlogic.com/248f8472-1b41-4a43-9f88-4aee598a9ac5/3a432c62-73da-4923-89e9-381dea00c404/A2hgHbgIu9KUL5FJk3cZxvO2F/dkhBUAKz3P1WyD49Ky83KlFcH.pdf?targetFileName=OnLogic-MC850-70-SpecSheet-v1.pdf>" %}

{% embed url="<https://www.asrockrack.com/general/productdetail.asp?Model=EPC621D4I-2M#Specifications>" %}

### Startup Settings

#### Auto Power On

1. Power on the unit and press the Del key to access the BIOS
2. Navigate to the Advanced tab
3. Open the Chipset Configuration menu
4. Change “Restore AC Power Loss” to \[Power On]

<figure><img src="/files/a7QHIqFjRWaBUtpwT6LT" alt=""><figcaption></figcaption></figure>

5. Save changes and exit
6. Auto power on is now enabled

#### Clear CMOS

1. Follow disassembly steps listed at the top of this page
2. You will need to remove any PCIe cards that may be installed in the system
3. Locate the clear CMOS pads

<figure><img src="/files/GDtVPIqaDx9kWTujHcjK" alt=""><figcaption></figcaption></figure>

4. Short the two metal halves with a flathead screwdriver for 30 seconds

<figure><img src="/files/5gqbpFKN3x8mUwlCOdYP" alt=""><figcaption></figcaption></figure>

5. The CMOS is now clear

## <mark style="color:blue;">Security Advisory</mark>

For the latest security advisories concerning OnLogic products, including vulnerability disclosures and necessary updates, please refer to our official Security Advisories page. It is recommended to regularly check this resource for critical security information.\
[**Access Security Advisories**](/support-articles/security-advisories.md)


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