First case: HP
Pavilion 15-bc000 Notebook PC series (Touch) won’t turn on at all,
When you plug the AC adapter into the laptop, there
are no lights, all led off. When you push on the power button, nothing happens,
all led stays off, and there are no sounds. The laptop appears to be completely
dead.
Possible problem:
· The AC adapter failed and the battery has no charge
left, the motherboard doesn’t receive any power from the
adapter. In this case test the AC adapter with a voltmeter. If it’s dead,
replace it with a new one.
· Power jack failed and the battery has no charge left, the motherboard doesn’t receive any power from the
AC adapter. In this case measure the voltage on power jack connection if there
is no voltage, the power jack has to be replaced.
· Some electronics components on the motherboard failed, in most case there are a short in some SMD capacitor
or MOSFET directly after power jack. Test the continuity with a voltmeter and
check electronics components temperature with your finger. The failed
electronic component has to be replaced (If you have AC adapter with led and
the adapter led turn off every time you plug the adapter into laptop that is
sign of short in electronic component after the power jack).
· BIOS failed, System power (3V/5V) work fine, you can measure the 3.3V and 5V on the
motherboard, No electronics components have short or overheating and 3.3V on
the power button, BIOS has to be reprogrammed (flash bios).
· Motherboard completely dead. The motherboard has to be replaced, if it’s not too
expensive. Otherwise get ready to buy a new laptop.
Second case: HP
Pavilion 15-bc000 Notebook PC series (Touch) won’t turn on, wont boot,
When you plug the AC adapter into the laptop, the
charge led come on, but when you push on the power button, nothing happens, the
power led stays off, and there are no sounds. The laptop appears to be dead.
Possible problem:
· Power button failed, power button has to be repaired
· Electrostatic charge in the motherboard, the laptop has to discharge electrostatic. Take off
the laptop battery, unplug the AC adapter and push the power button for 1
minute then plug the AC adapter and turn on the laptop ( in some case you have
to take off the CMOS battery too).
· Some electronics components on the motherboard failed, in most case there are a short in some MOSFET. Test
the continuity with a voltmeter and check electronics components temperature
with your finger, test system power (3V/5V/+V1.8/+V1.25S/+VGFX/+VCCP), CPU
power (VCC_CORE), you need Electronic Schematic Diagram for Laptop Laptop HP
Classmate Notebook PC doesn’t turn on at all. The failed electronic component
has to be replaced.
· BIOS failed, System power (3V/5V) work fine, you can measure the 3.3V and 5V on the
motherboard, No electronics components have short or overheating and 3.3V on
the power button, BIOS has to be reprogrammed (flash bios).
· Motherboard completely dead. The motherboard has to be replaced, if it’s not too
expensive. Otherwise get ready to buy a new computer.
For other HP
Pavilion 15-bc000 Notebook PC series (Touch) use search box or write a comment.
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