It sounds like your Lenovo V14 is stuck in a "power-on self-test" (POST) failure loop. That specific 12-white-flash sequence on a Lenovo usually indicates that the system is detecting a hardware component that isn't responding correctly-often the Power Management IC or a specific rail (like the CPU or RAM voltage) failing to stabilize.

Since you've already tried the "flea power" drain (holding the power button), here are the most effective manual steps to "encourage" it back to life:

1. The Novo Button Reset

Lenovo laptops have a tiny "Novo" button (usually a small pinhole with a curved arrow icon next to it) on the side of the chassis.

• Ensure the laptop is off and unplugged.
• Use a paperclip to press and hold the Novo button for 10 seconds.
• If it responds, it should boot into a BIOS/Recovery menu. Select Normal Startup.

2. Reseating the CMOS Battery

Sometimes the volatile memory isn't fully cleared by the power button alone if the CMOS battery (the small coin-cell battery) is still providing a tiny trickle of current to the BIOS chip.

• Open the back panel.
• Locate the small circular battery (usually wrapped in black or blue electrical tape with two wires).
• Unplug the CMOS battery and the main battery.
• Hold the power button for 60 seconds.
• Plug only the CMOS battery back in, then the power adapter, and try to boot.

3. The "One-Stick" RAM Test

If your V14 has a removable RAM slot (some have 4GB soldered and one expansion slot), a faulty or poorly seated RAM module is a prime suspect for those 12 flashes.

• Remove the expansion RAM stick entirely.
• Try to boot using only the soldered memory.
• If it boots, the RAM stick is faulty. If it doesn't, try cleaning the gold contacts of the RAM stick with an eraser and putting it back in firmly.

4. HDMI Trigger

Occasionally, the display assembly fails to "wake up," causing the motherboard to throw an error code.

• Plug the laptop into an external monitor via HDMI.
• Attempt to power it on. Sometimes the handshake with an external display forces the GPU to initialize, breaking the error loop.

Comparison of Symptoms

If none of these manual "nudges" work, it may be a failure of the charging circuit on the motherboard itself. Does the light change color or pattern when you plug the AC adapter back in, or does it stay strictly at those 12 white flashes?