black spot on lcd screen repair made in china

Responsible for performing installations and repairs (motors, starters, fuses, electrical power to machine etc.) for industrial equipment and machines in order to support the achievement of Nelson-Miller’s business goals and objectives:

• Perform highly diversified duties to install and maintain electrical apparatus on production machines and any other facility equipment (Screen Print, Punch Press, Steel Rule Die, Automated Machines, Turret, Laser Cutting Machines, etc.).

• Provide electrical emergency/unscheduled diagnostics, repairs of production equipment during production and performs scheduled electrical maintenance repairs of production equipment during machine service.

Hi. It´s very good instruction. I could repair my multimeter YF-3503 Yufong. Thank U a lot of. My problem was exactly like in this video, Images of then.

Great fix - I was just about to bin my meter when I googled this. Followed the instructions, used UHU glue instead of a glue gun, now the display is perfect - many thanks! Pity I didn"t take a before pic but there was a big black oval covering most of the screen.

The most attractive part of your phone is the screen, yet it’s also the most delicate component. This is why it requires special care and attention. Physical damage to your screen mostly takes the form of obvious cracks in the glass, but you may also come across what appears like an ink spot (blot) or bleeding pixels. When the black spot is spreading on your phone screen, you need to have the screen replaced. If you try to repair the phone yourself, you may cause more damage to it, thus complicating the issue.

Hence, seek the help of professionals. Fortunately, Carlcare service center is here to assist you in replacing the damaged screen with an original unit.

Our trained technicians have a great wealth of experience in fixing various issues with a phone’s screen, offering you a flawless screen replacement service best suited to your specific model. Let’s learn more!

When that happens, black and/or blue and purple spots may appear on your screen. If an individual pixel gets damaged, it’ll stay turned off and also appear black.

When more pixels become damaged, the black spots will spread over your phone’s screen like an oil stain. While there are some tips given online on fixing this issue, applying them may do further damage to your device. The best line of action to follow is to seek professional help.

To solve the issue of black spot spreading on your phone’s screen, you need to get the screen replaced. When looking for a screen replacement, here are some factors to take into consideration:

If you’re using a TECNO, Infinix, or itel phone , the best option for repairing the device is the Carlcare Service — the sole authorized service center of these brands. One of the perks Carlcare offers you is that if your smartphone’s warranty is still valid or you have an additional Screen protection plan, you might be able to cut down on the cost of the screen replacement service.

If the black (ink) spot is spreading on the screen of your Infinix, TECNO, or itel phone, simply walk into a Carlcare service center nearby and have it replaced. Join the thousands of customers that love our repair service due to the following benefits we provide for them:

With the Online Reservation feature, you’ll be able to select what you want exactly, and the option also prevents a waste of time because you won’t have to wait in a queue.

All newly repaired phone screens purchased from Carlcare have a solid warranty of up to 90 days. The meaning of this is that if the screen has any defect within that warranty period, we’ll fix it for you for free.

This is another reason why you should use Carlcare repair service for your phone screen replacement. On our website or via the Carlcare app, you can check the cost of a screen replacement service for popular Infinix, TECNO, and Itel models, including iPhone and other phone brands as well. Simply visit the Carlcare official website, scroll up, and place the icon on Check.

Alternatively, launch the Carlcare app, then press Price to know the price details. By doing so, you can have an idea of how much to budget for screen replacement. However, note that the prices you’ll see are not fixed.

If you have had a poor phone repair experience with a quack technician, Carlcare is here to give you a break. Our service centers are run by highly trained and experienced engineers, who will handle your request professionally. Thus, with Carlcare, you can rest assured your precious phone is in good hands.

Ok.... look. I am working on a PhD in Robotics and hold an MS in electrical engineering. These spots will go away, but only after many on/off + rgb + bl cycles UNLESS the screen is cracked. Electrons displace themselves from each other. At some point, something got squished. My advice, use your device SPARINGLY but DO USE IT. Turn on the display at least once a day, no more than a dozen, for a few weeks. If the spots are growing, you may have a seal problem preventing the screen aligning itself. If they are EXACTLY the same. New screen bezel, sorry.

I order a brand-new LCD-Unit or Digitizer along with the adhesive tape (already cut out in the right dimensions) off a wholesaler, clean the frame with 99% alcohol and Q-tips or microfibre cloth and install the new screen onto the frame.

If you have a cracked or broken LCD screen, please use one of the following options to repair or replace it. Self-repair is not recommended.LCD display screens on notebook computers are made of two thin layers of glass with dark liquid crystal material in between. The glass is covered on the outside by a layer of plastic. Customers often feel that there cannot be a broken LCD display because they cannot feel the break. However, cracks in the glass usually cannot be felt because the plastic covering rarely breaks or fractures.

Black “spots” might also appear. This can be liquid crystal material spilling out of a crack. A crack might be present which causes lines to appear but no liquid crystal spots are apparent. The spots might be small or might appear later or grow larger in time. Customers often say that there were no black spot(s) when the unit was sent for repair, so it must have occurred during or after shipment.

It is important to understand that lines on the LCD can also be caused by video driver issues or a problem with the media you are using. Video driver issues can normally be resolved by downloading and installing a new video driver. However, if the damage is due to a broken LCD, you should understand the following policies.

Customer Induced Damage is not covered under standard warranty. It is included only in Accidental Damage Protection. Most damaged or broken LCDs will be considered as CID.

Occasionally there are exceptions. Therefore, you may wish to contact a service agent for additional information. Also, for customers who receive their unit from service with damage, the repair will be set up as an exception.

Diagonal or jagged lines (white area in 1) and both horizontal and vertical lines indicate panel damage. One set of either horizontal or vertical lines might be a damaged panel, but can also be caused by graphics system failure or a loose internal video cable.

White spots or lightened localized areas-Lighter areas or white spots are visible on the screen. This typically happens when a sharp object or edge forcefully contacts the display screen.

Dark spots in localized areas, an example of Mura defects-Dark spots are on the screen. These wide-area pixel defects are typically caused by a sharp object hitting the screen.

Black "splotches" or "blotches" with bright white areas exposed-The internal glass has cracked allowing liquid crystal to pool into areas (the black blotches). When this happens, the areas void of liquid crystal are bright white.

Black splotches cutting through the screen-The internal glass has cracked and liquid crystal is leaking (sometimes call bleeding) inside the display panel along the crack.

If you do not have an ADP policy and do not want to pay for the repair of a damaged LCD, you can connect an external monitor and use the notebook as-is. Or you could purchase a keyboard, mouse, and monitor, and use the notebook as if it were a desktop tower. LCD screen damage usually doesn"t affect the operation of the notebook computer. You can also remove the hard drive and use it in an external enclosure on another computer.

Ever had your TV showing nothing but a black screen even if the audio was working? Unfortunately, that’s a common issue with low/middle-end LCD/LED TVs these days… Even more frustrating, this issue often comes from a rather tiny and cheap component that can be easily replaced. Most common issues are:

One of my relatives had this exact symptom happening all of a sudden. This problem on low-end TVs often occurs within the first couple years. As the repair costs for that kind of TV is pretty low, considering repairing it yourself might be a good idea!

The first step into repair is to find the root cause of the issue. As backlight failure is a very common issue, this is the first thing to test. To do so, the easiest way is to power on your screen, put a flashlight very close to it and check if you can see the image through. The image would be very dark, like turning the brightness of the screen very very low.

That implies disassembling the TV to access the backlight which is between the LCD screen in the front and the boards in the rear. In my case, with a Samsung F5000, I had to process as follows:

First we have to remove the back housing to reveal the boards (from left to right: main board, T-CON, power supply) and disconnect the LCD panel from the T-CON board.

Note: Older TVs have neon tubes for backlight, which is thicker and less exposed to this kind of failure. LED backlight is the most common thing these days, but do not mistake an LED TV with an OLED TV. The first one is a classic LCD panel with a LED backlight, whereas the second is an OLED panel that doesn’t need any backlight as it is integrated in each pixels (making the spare parts much more expensive by the way).

As we can see, the backlight system is made of 5 LED strips. First thing to do is look for burnt LEDs. Most LED backlight systems have strips set in series, meaning that if one of the them fails, all the system goes dark…

Using a multimeter, we can confirm that the strips are indeed set in series, so now we have to test each strip individually. Professionals use LED testers such as this one (about 40$ on amazon) but as I didn’t had one at the time, I decided to make one, McGyver style!