> Source: [sk179604](https://support.checkpoint.com/results/sk/sk179604)

# sk179604 - Fix for possible CPU instability in Spark Firewall 1600 / 1800

| Property | Value |
|----------|-------|
| Solution ID | sk179604 |
| Date Created | 2022-06-26 |
| Last Modified | 2023-02-06 |
| Technical Level | General |
| Products | Spark Firewall (Locally Managed) |
| Versions | R81.10.X |
| Platform | 1600, 1800 |

## Symptoms

- * Hardware issue on the 1600 and 1800 appliance which may cause a malfunction.

* This issue is relevant only to 1600 and 1800 appliances shipped before January 2022.

## Solution

**To resolve the problem:**

1. Download the updated image:

   |---------------------------------------------------------------------------------------------------------------------------------------------------------------|---------------------------------------------------------------------------------------------------------------------------------------------------------------|
   | **1600/1800 Images**                                                                                                                                          | **1600/1800 SmartUpdate**                                                                                                                                     |
   | [R80.20.35 Build 992002634](https://supportcenter.checkpoint.com/supportcenter/portal?action=portlets.DCFileAction&eventSubmit_doGetdcdetails=&fileid=123388) | [R80.20.35 build 992002634](https://supportcenter.checkpoint.com/supportcenter/portal?action=portlets.DCFileAction&eventSubmit_doGetdcdetails=&fileid=126796) |
   | [R80.20.40 Build 992002650](https://supportcenter.checkpoint.com/supportcenter/portal?action=portlets.DCFileAction&eventSubmit_doGetdcdetails=&fileid=124008) | N/A                                                                                                                                                           |
   | [R81.10.00 Build 996000506](https://supportcenter.checkpoint.com/supportcenter/portal?action=portlets.DCFileAction&eventSubmit_doGetdcdetails=&fileid=124010) | [R81.10.00 build 996000506](https://supportcenter.checkpoint.com/supportcenter/portal?action=portlets.DCFileAction&eventSubmit_doGetdcdetails=&fileid=124235) |

   For R80.20.40 build 2650-uboot can be installed on top of latest GA -- build 2665.

   For R81.10.00 build 0506-uboot can be installed on top of latest GA -- build 0506.
2. Perform a firmware upgrade.

The firmware above performs a one-time fix upon booting up. After running this firmware, you may upgrade at any time with new firmware as needed.

The upgrade does not affect your gateway configuration.

To learn how to upgrade the firmware on your gateway, visit the "Backup, Restore and Other System Operations" section in the [R80.20.X Locally Managed Administration Guide](https://sc1.checkpoint.com/documents/SMB_R80.20.35/AdminGuides/Locally_Managed/EN/Topics/Backup-Restore-Upgrade-and-Other-System-Operatons.htm).  

**To verify that the firmware upgrade was successful:**

In the WebUI, check the version number on the **Home** \> **System** page:  

![](https://sc1.checkpoint.com/sc/SolutionsStatics/sk179604/sk179604202206281351011.png)

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