Keysight 654xA, 655xA, 664xA, 665xA Error E4: Primary interface external RAM test failed (power-on).

GPIB DC Power Supply · taken from the manufacturer’s manual, pages cited

Error codeE4

Primary interface external RAM test failed (power-on) due to a defective RAM A2U108. The manual lists no action for this code.

Model
Keysight 654xA, 655xA, 664xA, 665xA
Display shows
Primary interface external RAM test failed (power-on). (E4)
Type
Error code
Source
Manual p. 37

What E4 means

Primary interface external RAM test failed (power-on). p. 37

Common causes

  • RAM A2U108 defective. p. 37

If E4 is still not resolved

The manual gives no further instruction for this code. Open the code table in the PDF or contact Keysight service.

Open the manual at page 37 All 654xA, 655xA, 664xA, 665xA error codes Manual details & download

This page summarises what the manufacturer’s manual says about E4; each statement links to the page it comes from, and quoted lines are copied word for word. It is not a substitute for the manual or for a qualified installer. ManualLib is not affiliated with Keysight. Found a mistake? Report an error.