The PC will not turn on. Pressing the power button, the LED turns on and the screen lights up but sometimes does not show anything.
In some cases, the power LED lights up for a while and then go out again and still the screen remains black.
The cause may depend on several factors: in this case, I show how to completely dismantle this PC and then fix it by reflow nVideo video chip on the motherboard.
There is also a version with ATI video chip that suffers the same problem (see my other article).
Imiziamo with the work as usual on the bottom of the pc. Of course we must dismantle everything so you need to remove the screws of the covers, all the screws of the body and start to disconnect all peripherals: RAM, burner, WiFi card, hard drive, etc.
This air intake fan very obstructed ago already understand the cause of death of this PC …
Detach the hard disk:
We dismantle the WiFi adapter:
We extract the DVD:
After removing all the screws, we work on top of the PC, pulling the upper frame including the power button:
Now it’s up to the keyboard for which we have to unscrew the screws that hold it to the body.
Detach the keyboard flat gently ..
Now it’s up to the screws under the keyboard compartment and all the pins and flat:
We can pull the two WiFi antenna cables that are naturally linked to the video display.
Now detach the flat connector video
Finally svitiamo and other flat cables coming from the display and Take the screws that secure it to the rest of the PC.
Detach the display ..
Svitiamo the latest screws of upper body ..
Subsequently helping us with a pick or a special plastic tool we separate the two bodies:
And here we are in front of the motherboard:
We can see the back of the motherboard: the front is where there are the CPU and the chipset including the GPU (graphics processor) and is basically facing down.
Take the screws that hold the motherboard fixed to the base and all cables and flat.
And finally here is the motherboard removed from homes. We provide to unscrew the heat sinks and fan.
At this point I started the stage rework processors starting to prepare the motherboard.
I unplugged before any rubber part on the motherboard, then I cleaned meticulously processors and all components.
The phase of the repair included a reflow of the video processor and nVidia chipset with the usual procedure: I made a preheat to 150 °, eliminated the red silicone present on edges of processors, forced the flux between the solder ball and subsequently led the 2 processors at about 210 °.
The risk in this case was the absence of the temperature curves for one of the BGA for which I improvised: however the result was excellent.
After making the rework of the motherboard, I proceeded to clean the fan and heatsink then I proceeded to change thermal paste and began to reassemble everything.
After reassembling the pc is magically come back to life …