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). A degraded state is most often a failed power supply, drive, or memory module. (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), tested before shipping. Send us the IML entry and we'll match the part. See also: Server status lights overview and Dell PowerEdge amber light guide.
Source: HPE ProLiant DL380 Gen10 front-panel LEDs & health status.