Member Avatar for Stefano Mtangoo

Kind: HP ProBook 4510s

hi all,
I last time switched off my laptop after using it on projector. i disconnected projector fine, then turn it off normal. Then next day I turned on and screen was black and blue light at power button as usual.

I decided that I would turn it so I hold power button and it wont turn off, then I had to remove adapter cable and then remove battery and it went off. Returning battery and push power button nothing happens, remove battery and adapter then press the power button for looong time then power cable without battery, press power button; nothing happened.

Only orange light near adapter plug is on whether it be on power or on battery that LED is on. I have googled for a day now and cannot find any solution. Any help is appreciated!

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Dani AI

Generated

Practical diagnostic checklist and next steps — building on ’s note about possible hardware faults and the intermittent recovery described by . The goal is to quickly narrow the cause so the right repair or replacement can be chosen and crucial data can be backed up if the machine becomes usable again.

  • Power-drain (hard) reset: disconnect AC and remove a removable battery, then hold the power button for 15–30 seconds to discharge capacitors. Reconnect AC (no battery) and try to power on. If it boots on AC only, the battery or its circuitry is suspect.
  • AC adapter & DC jack: inspect the adapter and jack for looseness, frayed cable, unusual heat or smell. If comfortable, confirm adapter output with a multimeter or try a known-good compatible adapter.
  • Observe signs: note LED colors/patterns, fan spin, HDD/SSD activity or beep codes. These clues narrow whether the board is alive but the display is dead, or whether the machine never reaches POST.
  • Display vs. system: if lights/fans run but screen is blank, attach an external monitor to rule out LCD/inverter/backlight or GPU issues.
  • Memory and drives: reseat RAM modules (try one stick at a time) and reseat the HDD/SSD. A bad RAM stick often prevents POST but leaves power LED on.
  • BIOS/firmware: only after stable power is restored, run built-in diagnostics (HP machines typically offer a startup menu/diagnostics via ESC/F2 at power-up) and consider a BIOS reset by removing the CMOS battery briefly.
  • Intermittent recovery points to a loose connector, failing battery/adapter, or a marginal component on the motherboard; backup data immediately if the system becomes usable.

Cautions: stop if under warranty or if there’s visible battery swelling, burning smell, or loose power jack — hand it to an authorized technician. Take ESD precautions when opening the case. When contacting a repair shop, report the exact LED/beep behavior and the steps already tried to speed diagnosis.

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Member Avatar for Rik_

Sounds like a hardware fault! You will probably hve to take it to a professional for diagnosis.

Member Avatar for Stefano Mtangoo

Hi Rik,
Actually it is on. I Just did all troubshoot I could think of and try to reacharge and nothing happened. I resorted to my last fort, God! I prayed for it, left for the church come back and it was dead! Then I did the same as yesterday, tried to recharge and in few minutes everything was Ok!

As long as it works, no more pokes, Just praising the Lord,
oh thanks you Jesus!

Oh, BTW thank you for posting...I appreciate it!

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