Pressing The Power Button Of The Toshiba Satellite L300D The LED Light Turns On But The Screen Stays Black
The ATI Graphics Chip Does Not Work
Rework Processor ATI
At power virtually pc seems to start but then stops. The fans in some cases also run, and seems to go perfectly .. mah after a few seconds you realize that the screen remains BLACK ..
Note: the photos published here are based on a similar model, a Toshiba Satellite U400D 200 PSU48E. Disassembly and repair are very similar: change the arrangement of parts (connectors, type of ram and sink) but the platforms have a lot in common. Just can publish accurate photos of this model.
Then dismantle everything that is placed on the underside of the computer: hardware, hard drives, ram bancheti, lids, battery, WiFi card, burner, etc.
Detach the plastic rod horizontal present above the keyboard. It ‘just stuck.
We dismantle the keyboard …
Svitiamo all screws that we can see … we detach flat and connectors … finally helping us with some plastic instruments detach the upper shell of the pc …
And here we are in front of the motherboard. Detach all flat, pins and screws that hold it fixed to the base.On this model it is not necessary to remove the display. Time gained …
And here’s the motherboard to complete. In the picture you see I have not taken a lot of stuff, like banquets memory and battery. You must disconnect ALL to do a rework of the GPU.
We arrange to remove the heatsink and fan.
In the photo below, under the CPU are the ‘bad guy’, our AMD RADEON that needs to be revitalized …
We provide a clean everything, removing the thermal paste, turn on the plate for preheat, we shoot a lot of NC-559 under the so-called and try to make a reflow temperature by referring to the diagrams for this BGA.
If we really want to do things for her going dissaldiamolo completely redo and even the ball of tin.
Personally on this model and with this GPU have been very successful with a reflow.
Then replace the thermal paste with a new one, we clean the fan and heatsink and richiudiamo all …
I try a first power because I want to understand if everything is ok before re everything pretty well … ET VOILA ‘!! Lights up !! And thank goodness …
And here quà our TOSHIBA Satellite U400D 200 PSU48E working perfectly !!
After several tests (which lasted a week …) I have concluded that the repair was successful and so I returned the PC.