Horizontal stripes on the TV screen.

The appearance of stripes on the screen indicates a malfunction of the TV. It is best to invite a craftsman who professionally repairs the device. If the owner himself wants to understand the problem, we must not forget about safety.

Why do horizontal stripes appear

The problem in the form of horizontal stripes on the TV screen has specific reasons. For example, a narrow white bar means that the source of the problem is a frame scan. The problems that caused the trouble may include the following:

  1. Capacitors strapping the personnel microcircuit are damaged.
  2. The frame chip does not have power.
  3. Cracks formed in the elements of the Raman scattering (frame scan).

If horizontal or vertical stripes appear on the monitor, then the following factors can cause problems:

  • in case of matrix malfunctions, colored verticals appear;
  • horizontal stripes of different nuances inform about the disconnection of the loop from the matrix;
  • if the matrix makes a mistake, a thin vertical line appears;
  • decoder failure is characterized by black bars;
  • a white horizontal means a frame scan problem.

In these cases, you need to contact a specialist.

If a narrow white vertical line appears on the monitor, this indicates a single matrix error. If the reason is a change in voltage, then after a while the TV is restored and continues the demonstration in normal mode.

One or more vertical monochrome stripes appear due to the breakdown of the matrix. Partial repair or replacement of the entire part will help here. Horizontal multi-colored stripes mean that the contact of the loop with the matrix is ​​weakened. Or the connection between them has completely disappeared. To solve the problem, it will be enough to solder the contacts.

Microcircuit malfunction

You need to make sure that there are no ring cracks in the solder in the microcircuit itself and the harness. This problem may be the main cause of the problem. If cracks are detected, then you need to re-solder the findings of the part.

Then you need to look at the stress distribution. It can be 9 volts or 45 volts, depending on the chip. The preliminary stage of the component is powered by a low voltage, and the output channel is fed by a high voltage.

Typically, the frame scan is powered by TDKS. But there are TV models that receive voltage from the power supply. So, the power is supplied through rupture resistors and is supplied to the corresponding inputs. When these resistors break, the TV starts broadcasting a white strip. Also, a broken resistor may indicate:

  • malfunction of a personnel microcircuit;
  • the existence of any load in the Kyrgyz Republic.

Has a horizontal bar appeared on the TV screen? To solve the problem, you need to look for swollen capacitors in the harness, in the output stage, according to the power supply of the circuit itself. Usually they have a large capacitance: 1000-2000 uF. They can be soldered, or better yet replaced.

Open coil

One of the reasons for the appearance of the white strip is the breakage of the frame coils. This is a very rare type of malfunction. As a rule, they should be replaced to correct the defect.

Why did horizontal stripes appear on the TV screen? If conclusions are discarded near the rations on the panel of the deflecting system, they should be restored. No replacement parts are required for this. The wires here are quite thick and torn very rarely. But the inter-turn circuit requires a complete replacement of the coils. Unfortunately, they are very difficult to find on sale. Therefore, the specialist masters and winds them himself, which is very laborious and difficult. You should also see if the coils at the terminals are soldered.

Decoder malfunctions

The appearance of a white bar indicates problems in the decoder of the columns (rows) on the matrix. The cause of the trouble can be a power surge or a blow during a thunderstorm. If you do not immediately resort to repair, the strip will increase.

In case of decoder problems, it is necessary to change the matrix, and its cost is quite expensive. The part is located on the matrix or on the cable located in front of it. Warming the junction of the loop with the matrix helps for a while or does not help at all.

But you should not always resort to an expensive procedure. Sometimes the problem of horizontal stripes in a TV is:

  • the need to replace the T-KON board;
  • the loose position of the loop matrix.

A little surgery will quickly solve the problem.

Watch the video: How to Fix LED LCD TV with horizontal & vertical lines on the screen (March 2024).

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