Buzz
Sony TVs may encounter certain issues after prolonged use. Among them, the problem of the TV screen turning white is quite common and affects everyone's viewing experience. So, what are the reasons behind this phenomenon? How can it be resolved? Mytour will address all queries in detail in the following article.
1. Causes of Sony TV White Screen
When a Sony TV displays a white screen, all images cannot be displayed, and the screen only shows a white color. This phenomenon is caused by various factors, but mainly due to reasons such as:
1.1 Due to TV sensors or settings
During the use of Sony TVs, users may accidentally switch the TV to the fully bright screen mode. Alternatively, the TV may have a light sensor mode that also causes the white screen phenomenon.
1.2 Due to loose connections between the control motherboard and the mainboard
Another cause is loose cable connections between the IC and the mainboard, preventing the mainboard from sending signals to the IC and resulting in a white screen. For some Sony TV models, if there's no signal transmitted from the control board, the screen will automatically turn off.
1.3 Due to damaged fuses in the circuit board
In TVs, there's always a small fuse on the VCC to IC, tasked with providing resistance to the IC circuit. If the fuse is damaged, signals cannot be transmitted to the IC circuit. Therefore, images won't appear, and the TV screen will be white.
1.4 Due to high Ohm measurement of the capacitor's equivalent series resistance (ESR)
If a Sony TV experiences capacitor aging or high Ohm measurement of the capacitor's equivalent series resistance (ESR), it can result in a blank screen or flickering. To identify this, perform an ESR check.
1.5 Due to mainboard malfunctions
One of the reasons for a Sony TV displaying a blank screen is when the mainboard encounters any issues preventing signal transmission to the control circuitry. Consequently, the TV screen turns white.
2. Solutions for Sony TV White Screen
There are numerous factors causing a Sony TV to exhibit a white screen. To resolve this, follow these steps:
2.1 Adjust the TV settings and balance the room lighting
Start by adjusting the screen brightness to a suitable level. Navigate to Option => Picture => Settings on the remote control and adjust the brightness accordingly. If the issue persists, consider rebalancing the room lighting by dimming or covering some light sources in the TV display area.
2.2 Check the connection between the motherboard and the mainboard
If you have adjusted the TV settings and balanced the brightness but still encounter issues, check the connection between the control motherboard and the mainboard. If there's any looseness or detachment, reattach firmly. If the cable is damaged, replace it with a new one. This will resolve the white screen issue.
2.3 Inspect the fuses in the control board
You can check if the fuses in the control board are damaged using a multimeter. If a fuse is blown, replace it. If the fuses are intact but there's no signal to the control IC circuitry, consider replacing the control board.
2.4 Verify the functionality of the control mainboard
In this case, it can be quite challenging and typically requires bringing it to a professional repair center. To diagnose where the mainboard issues lie, specialized equipment such as an oscilloscope is needed to measure signals at various points on connectors, the mainboard, or control ICs. If capacitors, circuits, or the mainboard are faulty, they need replacement.
These insights help you understand the causes and remedies for Sony TVs experiencing blank screens. If unable to troubleshoot independently, it's advisable to seek assistance from a professional repair center for the best repair advice and support.
