How to repair Aspire 4736 laptop no sound problems
To repair laptop Aspire 4736 no sound we should do checking steps below for first to ensure the problems source.
1. Check the driver software of the sound or audio. You can do this step using Device manager option on the laptop.
2. If you sure that is no problem with the step 1, try to connect the external speaker ( active speaker or other devices ).
3. If the sound working with the external speaker, the problem maybe caused by the broken internal speaker.
4. If the sound still not working with the external speaker, the problem maybe caused by the broken of the sound power IC or the sound IC ( we will discuss this later ).
After all the steps above done you should have the result and now you know the problem source of the laptop. Let's discuss this one by one.
Driver problem. If you think that the driver have get the trouble you can try to re-install all drivers software include the chipset driver and the sound driver. You should does not see the ! attribute at the Device Manager mean that no problem with the drivers.
Internal speaker problem. Laptop no sound may caused by the broken internal speaker, and we can ensure this condition using the multitester. Turn the selector to the OHM meter and check each legs of the speaker connector to know the condition of the speaker.
Sound IC problem. About the IC or chips of sound or audio device there are 2 chips we should check : Sound chips and sound power chips. Sound chips working as the sound generator and the sound power chips working as the amplifier to make the sounds sounded louder. Sound chips of Aspire 4736 is Realtek ALC888S with the code on the motherboard U24, and the sound power IC is APA2051Q ( U17 on the motherboard ). If the drivers installed correctly but no sound i think the problem is at the U24, but if the driver cannot installed correctly and the laptop no sound this mean the U17 get the trouble. Replace these chips to make the sound of the Aspire 4736 working well
1. Check the driver software of the sound or audio. You can do this step using Device manager option on the laptop.
2. If you sure that is no problem with the step 1, try to connect the external speaker ( active speaker or other devices ).
3. If the sound working with the external speaker, the problem maybe caused by the broken internal speaker.
4. If the sound still not working with the external speaker, the problem maybe caused by the broken of the sound power IC or the sound IC ( we will discuss this later ).
After all the steps above done you should have the result and now you know the problem source of the laptop. Let's discuss this one by one.
Driver problem. If you think that the driver have get the trouble you can try to re-install all drivers software include the chipset driver and the sound driver. You should does not see the ! attribute at the Device Manager mean that no problem with the drivers.
Internal speaker problem. Laptop no sound may caused by the broken internal speaker, and we can ensure this condition using the multitester. Turn the selector to the OHM meter and check each legs of the speaker connector to know the condition of the speaker.
Sound IC problem. About the IC or chips of sound or audio device there are 2 chips we should check : Sound chips and sound power chips. Sound chips working as the sound generator and the sound power chips working as the amplifier to make the sounds sounded louder. Sound chips of Aspire 4736 is Realtek ALC888S with the code on the motherboard U24, and the sound power IC is APA2051Q ( U17 on the motherboard ). If the drivers installed correctly but no sound i think the problem is at the U24, but if the driver cannot installed correctly and the laptop no sound this mean the U17 get the trouble. Replace these chips to make the sound of the Aspire 4736 working well
