On 28 Mar 2025, at 12:09, KC Chong via groups.io <kcgpda@...> wrote:

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Hi,

I am currently trying to repair an E4980A LCR Meter that is experiencing a power-on failure. When the unit is powered on, the self-test displays the following error message:

"E1000: Power On Test Failed: 100000,0,0,0,0,0,0."

All keys are locked and the device appears to be hung. However, when I enter service mode by pressing the Preset + Power On button, I am able to access all the keys and perform manual operations. I also conducted a manual self-test, and all tests passed without any issues.

Unfortunately, there is very little information available online about this specific issue. The data log I’ve attached shows a CPU[2] error (16), which could be a clue.

If anyone has any insights or has encountered a similar problem, I would greatly appreciate any advice or suggestions regarding the power-on test failure.

Thank you in advance for your help!

Sysinfo log:

ID: Agilent Technologies,E4980A,MY46312198,A.04.00
OPT: 200,710,710
POWER CYCLE: 482
POWER ON HOURS: 18165
SYSCAL REV: 1.00
SYSCAL DATE: 2014/12/10
R: Rev.1.01,,,
CPU[1]: 0
CPU[2]: 16
SYST[1]: 0
SYST[2]: 0
SYST[3]: 0
SYST[4]: 0
SYST[5]: 0
DATA[1]: 0
DATA[2]: 0
DATA[3]: 0
DATA[4]: 0
OPT[1]: 0
OPT[2]: 0
OPT[3]: 0
OPT[4]: 0
OPT[5]: 0
OPT[6]: 0
OPT[7]: 0
A1[1]: -1.189578915E+01
A1[2]: +1.163335800E+01
A1[3]: +5.106445313E+00
A1[4]: +3.349609375E+00
A1[5]: +2.490234375E+00
A1[6]: +5.102705002E+00
A2[1]: +6.593852455E-05
A2[2]: -4.669545332E-01
A2[3]: +4.929539280E-01
A2[4]: +4.640171965E-01
A2[5]: -4.558677030E-01
A2[6]: +5.084224205E-01
A3[1]: +5.968145488E-04
A3[2]: -8.684453465E-01
A3[3]: +8.727315869E-01
A3[4]: -7.707347339E-01
A3[5]: +5.249549693E-01
USER[1]: 0
USER[2]: 0
USER[3]: 0
USER[4]: 0
BATT[1]: +3.056640387E+00
+4.300000000E+01
+5.217538194E-01
+5.389070530E-01

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KC