⟐ Answered november 22, 2024 at 2:35 MST

⟐ Commented juli 18, 2026 at 20:11 MST

And i don't know how to fix it. Please help me.

⟐ Commented juli 18, 2026 at 4:54 MST

⟐ Answered juli 17, 2026 at 6:37 MST

Not reacting on any buttons combinations. Turns on only if I connect the power adapter.

Tried to change the battery but not helped.

Please help.

⟐ Commented juli 15, 2026 at 1:03 MST

I've tried several ways to solve the problem: toggling off the startup apps, optimizing the machine for the best performance, uninstalling several apps that I found out I didn't need (and probably were the cause of the problem), running some command prompt programs for fixing maybe any corrupted files and restoring the health of the machine, etc...

All of these, and more, haven't worked!

⟐ Commented juli 12, 2026 at 22:15 MST

⟐ Commented juli 11, 2026 at 1:41 MST

⟐ Answered juli 10, 2026 at 21:34 MST

I have already performed the following troubleshooting steps without success:

1. Hard Reset (Drained power for 60 seconds with battery/AC disconnected).

2. Tested with AC adapter only (internal battery disconnected).

3. Reprogrammed the BIOS (flashed known good firmware).

4. Isolated components (disconnected SSD, Wi-Fi, and secondary boards).

5. Attempted boot with CMOS/RTC battery disconnected.

The laptop shows NO blinking patterns on the Caps Lock/Num Lock keys and there is NO fan spin or display activity. Since the BIOS reprogram and basic isolation didn't work, I suspect a power rail failure on the motherboard.

Are there specific voltage rails (3.3V/5V/CPU_VCORE) or power management ICs (PMIC) known to fail on this model? Any advice on board-level measurements to take next would be greatly appreciated.

⟐ Commented juli 08, 2026 at 11:43 MST

I have been using an HP EliteBook 8560p for a while now. It performs tasks very well when on battery power, but when plugged in, it becomes unresponsive and unusable. It was hard to get the task manager screenshot, but I managed.

For some reason, the CPU is at 0.11 GHz when plugged in, but it goes to around 1 GHz (an average speed on the desktop with all apps closed) when on battery power. Can anyone explain and help me solve the significant slowdown of the CPU when plugged in? Thanks.

Here is a picture @oldturkey03,

I decided to check the motherboard's make and model from Windows, and the make is Hewlett-Packard with the model number 1618.

⟐ Answer accepted juli 05, 2026 at 6:54 MST

⟐ Answered juni 30, 2026 at 7:05 MST

- Tested with multiple known-good chargers and different wall outlets.

- Tried both USB-C charging ports on the laptop.

- Performed a hard reset by opening the laptop, disconnecting the internal battery, and holding the power button for 15+ seconds to drain residual power.

- Attempted to power the laptop on with the battery disconnected and only the AC adapter plugged in, but there is still no light and no power.

Since there is no light even with the battery bypassed, I suspect a motherboard or DC-in port issue. Are there specific fuses, MOSFETs, or charging ICs on this board known to fail that I should check?

⟐ Commented juni 28, 2026 at 7:27 MST

⟐ Answer edited juni 24, 2026 at 8:19 MST

⟐ Answered juni 24, 2026 at 6:02 MST

⟐ Commented juni 22, 2026 at 1:40 MST

⟐ Answer edited juni 19, 2026 at 19:22 MST