HPE ProLiant Health LED Amber/Red & IML Errors: Diagnosis and Replacement Parts
A flashing amber or red health LED on an HPE ProLiant signals a degraded or critical fault. This guide explains the front-panel LED states, how to pull the exact cause from iLO and the Integrated Management Log (IML), and which part (PSU, drive, DIMM, fan, cache battery) to replace.
TL;DR — read the health LED, then the IML
HPE ProLiant servers show a front system health LED:
- Solid green — normal.
- Flashing green — iLO is rebooting/initializing.
- Flashing amber — system degraded.
- Flashing red — system critical.
Amber/red means a component is failing. The exact cause comes from iLO -> Integrated Management Log (IML) (or SMH). (LED meanings per the HPE ProLiant DL380 Gen10 front-panel LED documentation.)
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Step 1: interpret the health LED
| LED | Meaning |
|---|---|
| Solid green | Healthy |
| Flashing green | iLO booting (wait) |
| Flashing amber | Degraded — a component needs attention |
| Flashing red | Critical — act now |
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Step 2: read the IML (the exact cause)
The health LED says "there's a problem"; the IML says what. Get to it via:
- iLO web interface -> Information -> Integrated Management Log, or
- System Management Homepage (SMH) / HPE management tools.
The IML logs the failed component and slot — e.g., "Power Supply 2 Failure," "Drive failure Box 1 Bay 3," "Uncorrectable Memory Error DIMM 5." That entry tells you the part.
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Step 3: confirm with the per-component LED
Inside the chassis, ProLiant lights an amber LED next to the failed item — the specific DIMM slot, drive bay, fan, or PSU. Between the IML and the component LED you'll know precisely what to replace.
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Symptom -> part
| IML / LED | Failing part | Fix |
|---|---|---|
| "Power Supply Failure" / amber PSU LED | Power supply | Replace PSU — PSU buying guide |
| "Drive Failure" / amber drive-bay LED | Drive | Replace — HP SAS drive / SSD guides |
| "Memory Error" / amber DIMM LED | DIMM | Replace (match rank/speed) |
| "Fan Failure" / amber fan LED | Fan | Replace fan |
| Smart Array "cache/battery" / write cache disabled | FBWC energy pack | Replace — Smart Array guide |
| CPU/board event, no POST | CPU / board | Reseat, then replace |
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Common real-world cases
- DL380 flashing amber, still running — almost always a degraded redundancy item: one PSU, a predictive-failure drive, or a single correctable-memory DIMM. Pull the IML, replace the named part.
- Red health LED, server shutting down — critical (often thermal, power, or uncorrectable memory). Check IML immediately; don't keep power-cycling.
- Write performance tanked + cache warning — the Smart Array FBWC battery/capacitor pack has aged; replace it to restore write-back cache.
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FAQ
Flashing amber vs flashing red? Amber = degraded (fix soon); red = critical (act now). Both warrant reading the IML.
Flashing green won't stop? That's iLO still initializing — give it a couple of minutes after power-on before treating it as a fault.
How do I read the IML without a monitor? Use iLO over the network (even iLO Standard shows the log) — no crash cart needed.
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Pro Disk Network stocks HPE ProLiant PSUs, drives, memory, fans, and Smart Array cache modules as an independent reseller of genuine HPE parts (not affiliated with HPE). See also: Server status lights overview and Dell PowerEdge amber light guide.
Source: HPE ProLiant DL380 Gen10 front-panel LEDs & health status.