My computer refuses to turn on, how may I fix this?

Hi all,

I have a lenovo h50-50 tower with the following specs:

psu:600 watt corsair cx600m
ram: 10gb ddr3
os: none
gpu: gtx 650ti boost
cpu: core i3 4160
120GB ssd



My computer will not turn on whatsoever meaning the fans will not spin or anything. I have taken my motherboard out and I use the power pins with a screwdriver to start it up and nothing turns on. I thought it was the psu right? No.. I used my factory PSU that came with the tower and no such luck.

I reseated the cmos battery, used a new one, no such luck

I removed my ram and no luck

I removed my gpu and no luck

I'm out of things to do...

Any help I would greatly appreciate!

AddRAM said:

A screwdriver ???

Maybe your motherboard died.

That's what I'm wondering but I found a way to turn it on. I've forced my power supply unit to turn on by putting a paper clip in it and my motherboard has received power!!

Everything spins and works except for the fact I have no display.. what do I do now?

Well id close my eyes and hope it doesn't blow up.

Sounds like a power spike blew the fuse, then you decided to use a paper clip, COOOL,
is there a secondary fuse to the monitor, that could have blown as well.
note there's a mini fuse in your tower as well.

Roy

logo897 said:

I've forced my power supply unit to turn on by putting a paper clip in it and my motherboard has received power!!

I interpreted this as shorting the ATX power socket (green wire) pin 16 to ground to test the psu. This only checks the psu will spin up - should also test voltages with a DVM. Since the psu soft switching is done by the mobo, this could point to faulty mobo or front panel switch/cabling.

If the OP was bypassing a blown fuse with the paper clip, all bets are off . . .

Hey everyone you can't blame a guy for trying! :/

A screwdriver to short the two power pins on the motherboard is a common method to signal the computer to start when removed from the case. Of course you have to be careful not to slip, but this is a perfectly acceptable way to power up outside the case. Shorting those two pins with a screwdriver is exactly what pressing the front panel power button does. So if you get the same results with the screwdriver, you know the front panel power button is not the problem.

As far as checking voltages with a volt-meter, he tried a different PSU.

It sounds like to me the motherboard is gone.

Itaregid said:

A screwdriver to short the two power pins on the motherboard is a common method to signal the computer to start when removed from the case. Of course you have to be careful not to slip, but this is a perfectly acceptable way to power up outside the case. Shorting those two pins with a screwdriver is exactly what pressing the front panel power button does. So if you get the same results with the screwdriver, you know the front panel power button is not the problem.

As far as checking voltages with a volt-meter, he tried a different PSU.

It sounds like to me the motherboard is gone.

Thanks yeah I'll have to get a new one

Hey all, sorry to bump but An old question:

Would putting this motherboard in the oven help fix it? Thanks. I heard it helps with reflow.

It would help to totally destroy it. Many devices are not very tolerant to heat and can be destroyed by heat that is not high enough to melt the solder. Motherboards also have many plastic pieces attached too. These include data and power connectors, expansion card and memory slots.

The most common solders used on circuit boards have a melting point between 183 and 188°C (361 and 370°F) - plenty hot to melt most plastics and warp the substrates used in many PCBs.