> Source: [sk120677](https://support.checkpoint.com/results/sk/sk120677)

# sk120677 - Scalable Platforms chassis hardware verification test fails with "Chassis fan is down", "CPU is down", and "Power unit is missing"

| Property | Value |
|----------|-------|
| Solution ID | sk120677 |
| Date Created | 2017-09-27 |
| Last Modified | 2025-06-26 |
| Technical Level | Advanced |
| Products | Scalable Platforms |
| Versions | R82, R81.20, R81.10 (EOS), R81 (EOS) |
| OS | Gaia |
| Platform | 41000 (EOL), 44000, 64000 |

## Symptoms

- * System diagnostics shows "Hardware" test fails with "Chassis fan is down", "CPU is down", and "Power unit is missing".

  ```
  
  [Expert@HostName-ch01-01]# asg diag print 2
  -------------------------------------------------------------------------------
  | Tests Status                                                                |
  -------------------------------------------------------------------------------
  | ID | Title              | Result     | Reason                               |
  -------------------------------------------------------------------------------
  | System Components                                                           |
  -------------------------------------------------------------------------------
  |  2 | Hardware           | Failed (!) | (1)Chassis fan is down               |
  |    |                    |            | (2)CPU is down                       |
  |    |                    |            | (3)Power unit is missing             |
  -------------------------------------------------------------------------------
  ```

* Hardware Monitor (asg hw_monitor) shows all components (other than CMM and SSM) at state "0".

  ```
  
  -------------------------------------------------------------------------------
  | Sensor           | Location       | Value | Threshold | Units       | State |
  -------------------------------------------------------------------------------
  | CMM              | bay 1          | 0     | 0         | (S,D)/(A)   | 1     |
  | CMM              | bay 2          | 1     | 0         | (S,D)/(A)   | 1     |
  | CPUtemp          | blade 1, CPU0  | 0     | 95        | Celsius     | 0     |
  | CPUtemp          | blade 1, CPU1  | 0     | 95        | Celsius     | 0     |
  | Fan              | bay 1, fan 1   | 0     | 11        | Speed Level | 0     |
  | Fan              | bay 1, fan 2   | 0     | 11        | Speed Level | 0     |
  | Fan              | bay 2, fan 1   | 0     | 11        | Speed Level | 0     |
  | Fan              | bay 2, fan 2   | 0     | 11        | Speed Level | 0     |
  | PowerConsumption | N/A            | 0     | 0         | Watts       | 0     |
  | PowerUnit(AC)    | bay 1          | 0     | 0         | NA          | 0     |
  | PowerUnit(AC)    | bay 2          | 0     | 0         | NA          | 0     |
  | SSM              | bay 1          | 0     | 0         | Mbps        | 1     |
  | SSM              | bay 2          | 0     | 0         | Mbps        | 1     |
  -------------------------------------------------------------------------------
  ```

* System stat (asg stat -v) shows zero out of zero for UP out of required sensors (Fans and Power Supplies).

  ```
  
  [Expert@HostName-ch01-01] asg stat -v
  --------------------------------------------------------------------------------
  | Chassis Parameters                                                           |
  --------------------------------------------------------------------------------
  | Unit                        |  Chassis 1     |  Chassis 2     |  Unit Weight |
  --------------------------------------------------------------------------------
  |                             |  UP / Required |  UP / Required |              |
  | SGMs                        |   2 / 2        |   2 / 2        |     11       |
  | Ports                       |                |                |              |
  |    Standard                 |   0 / 0        |   0 / 0        |     11       |
  |    Bond                     |   2 / 2        |   2 / 2        |     11       |
  |    Other                    |   0 / 0        |   0 / 0        |      6       |
  | Sensors                     |                |                |              |
  |    Fans                     |   0 / 0        |   0 / 0        |      5       |
  |    SSMs                     |   2 / 2        |   2 / 2        |     11       |
  |    CMMs                     |   2 / 2        |   2 / 2        |      6       |
  |    Power Supplies           |   0 / 0        |   0 / 0        |      6       |
  |                             |                |                |              |
  | Chassis Grade               |  78 / 78       |  78 / 78       |      -       |
  --------------------------------------------------------------------------------
  ```

* Querying the fans, the user receives a valid status:

  ```
  
  [Expert@HostName-ch01-01]# asg_chassis_ctrl get_fans_status
  
  Getting chassis fans speed
  fan #1 -> Health: 1,  Speed Level 4 (out of 15)
  fan #2 -> Health: 1,  Speed Level 4 (out of 15)
  fan #3 -> Health: 1,  Speed Level 4 (out of 15)
  fan #4 -> Health: 1,  Speed Level 4 (out of 15)
  fan #5 -> Health: 1,  Speed Level 4 (out of 15)
  fan #6 -> Health: 1,  Speed Level 4 (out of 15)
  ```

* Querying the power supplies, the user receives a failure message:

  ```
  
  [Expert@HostName-ch01-01]# asg_chassis_ctrl get_psu_status
  
  Getting chassis power supply units status
  Failed to retrieve power supply type, not retrieving status
  ```

* Fan status LEDs are in solid Red state.

## Cause

At the rear of the chassis, each 1U AC Line Input should be connected to AC PEM via a blue cable.

When the cable is disconnected, retrieving the sensors' data fails, resulting in the symptoms above.

## Solution

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---

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