Hi everyone,

I have an ASUS TUF Gaming F15 (Model: FX507ZC4-HN115W) with an Intel Core i5-12500H and RTX 3050. The laptop was working perfectly fine until yesterday. Today it suddenly refuses to power on. This model has dual DDR4 SO-DIMM slots and a 90Wh battery. 

Symptoms

When I plug in the charger, the battery LED turns orange, and after a few minutes it changes to white, which indicates that the battery is charged and the charger is being detected properly.

When I press the power button, the keyboard backlight flashes for less than a second and then immediately turns off.

The fans do not spin at all, not even for a moment.

The screen remains completely black.

No ASUS logo, BIOS screen, or display output.

The charging LED itself behaves normally and stays on.

There was no obvious trigger

No physical damage.

No liquid spill.

No overheating.

No burning smell.

No recent hardware upgrades.

The laptop was functioning perfectly the previous day.

Troubleshooting steps I've already tried

1. Hard reset / EC reset

Unplugged the charger.

Held the power button for 40–60 seconds.

Waited and tried again.

No change.

2. BIOS startup attempt

Tried holding F2 while pressing the power button.

Tried repeatedly pressing F2 and Esc during startup.

No response.

3. RAM troubleshooting

I have two RAM sticks installed:

One factory-installed RAM module.

One additional Crucial RAM module.

I have:

Removed and reinserted both RAM sticks.

Tried booting with only the factory RAM.

Tried booting with only the Crucial RAM.

Tested each stick individually to rule out a faulty RAM module.

The exact same behavior persists in every case.

4. Battery reset

Opened the laptop.

Disconnected the battery connector.

Waited a few minutes.

Reconnected the battery.

Still no change.

Current behavior

The laptop only does this:

Press power button → keyboard lights for a split second → immediate shutdown → no fan spin → black screen.

Since both RAM sticks failing simultaneously seems extremely unlikely and the charging LED behaves normally, I'm wondering:

Could this be a BIOS/Embedded Controller (EC) corruption issue?

Could a motherboard power delivery component (MOSFET/VRM/PMIC) fail suddenly even though the laptop was working perfectly the previous day?

Is there anything else I can try before taking it to an ASUS service center?

Any suggestions or similar experiences would be greatly appreciated. Thanks!

ASUS TUF Gaming F15 (FX507ZC4-HN115W, RTX 3050) suddenly won't power on – keyboard flashes for a split second, no fan spin