t520 lcd panel replacement video made in china

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Certain notebooks gain a reputation over the years, be it good or bad. The Lenovo ThinkPad-series has been one of those families that has grown for almost 20 years, while still retaining the namesake of being one of the best business notebooks money can buy. Today we look at the new Lenovo ThinkPad T520, which is a 15.6-inch mid-range business notebook that can be equipped with NVIDIA Optimus graphics and a wide range of unique storage options.

The model we are looking at today is the ThinkPad T520, which is based off a rather budget-friendly configuration. It includes Intel GMA HD 3000 integrated graphics, a base 1366×768 LED-backlit display, a second-generation Core i5-2540M processor, 8GB of DDR3 memory, and an Intel mSATA 80GB SSD. The battery is also the base option, which is a six-cell flush-mount model. A larger nine-cell battery is also offered, as is an even larger nine-cell secondary “slice” battery that clips to the bottom of the notebook.

At first glance it doesn’t look like much has changed in terms of the design of the ThinkPad T520. Lenovo has the same black rubbery paint covering the boxy shell of a body, with large stainless steel hinges displayed on both sides. The only thing displayed on the screen cover is the ThinkPad brand logo and the Lenovo name, keeping the rest matte black.

The bottom of the notebook does have one significant aesthetic change. The bottom shell has changed from a CFRP to a GFRP material (carbon-fiber to a glass-reinforced plastic) which has a different feel than the older T510 and a rougher texture. It doesn’t feel as though this change has impacted the structural rigidity of the body, since it is still as rigid as ever, although it has a more “hollowy” sound as you drag a fingernail over it. Underneath the plastic is still a tried-and-true alloy frame, giving the ThinkPad T520 its strength and durability.

Lenovo offers three different display options for the 15.6-inch T520. These include a 1366×768 HD panel, a 1600×900 HD+ mid-range offering, and a 1920×1080 95% gamut top-tier option. All screens include LED-backlighting and a matte-finish screen texture to reduce glare.

Our ThinkPad T520 included the base 1366×768 panel, which proved to be a good performer for basic duties. Color saturation appeared weaker than other panels, mostly in part to the matte texture versus glossy on consumer notebooks, but it got the job done. Backlight levels were more than adequate for viewing the screen indoors under bright lighting. Outdoor viewing would only be possible in a spot of shade, with the sun overpowering the screen. Contrast levels were adequate, with black levels appearing slightly washed out, especially outside of the sweet-spot. Viewing angles spanned 15 to 20 degrees with the screen tilted forward or back before colors started to invert.

The ThinkPad T520 has two forms of cursor movement, including a spacious multi-touch touchpad and a touchpoint interface. The touchpad measures 3 inches wide by 1.8 inches tall, located slightly left of center. The Synaptics-made touchpad features a textured surface which was easily to glide a finger across. Unlike completely glossy touchpads, the mild finish helps reduce friction even if your finger is oily or moist. As you can see below, the texture is small raised bumps spaced about 1mm apart in all directions.

The Lenovo ThinkPad T520 offers a good selection of ports and expansion features, albeit slightly condensed from what is given on the smaller T420. The T420 gains an eSATA connection, while the workstation-class W520 gets eSATA and two USB 3.0 ports.

The rear of the ThinkPad T520 includes an always-on USB 2.0 port for charging devices, a 56k modem connection, the battery opening, the DC-input for the power supply, as well as the rear outlet for the heatsink.

The left side of the notebook includes the bulk of the ports available on the T520. It includes three USB 2.0 ports, DisplayPort and VGA-out, FireWire 400, a Smart Card reader, and even a wireless on/off switch.

The Lenovo ThinkPad T520 was built with IT departments in mind, meaning that most components are accessible without much work. On the ThinkPad T520 user-components are split up into three areas of the notebook, including the primary hard drive bay, the lower memory cover, and the section underneath the keyboard which houses the processor, additional RAM slots, Wi-Fi card, and mSATA/WWAN slot.

The primary storage bay is easily opened by removing a single Phillips head screw. Once the cover is take off, the hard drive can be lifted and slid out of position. The hard drive follows the standard “ThinkPad” mounting configuration which includes thin rubber rails that slip over the sides of the drive and a metal caddy that the drive screws into. Upgrading to a new drive is as simple as removing four screws and swapping the pieces to the replacement.

The lower RAM compartment houses a single memory slot on the T520, whereas the workstation-class W520 has two slots on the bottom. The compartment also gives you access to one of the screws which holds the keyboard in place (which you need to remove if you want to get at the rest of the components up above).

At first glance our Lenovo ThinkPad  T520’s configuration might not look all that powerful with integrated graphics, but Intel has been making huge strides in this area recently. The new Sandy Bridge platform has been able to double or triple 3D performance from the previous generation integrated graphics chipsets. As we will show you in this section, not only is the GMA HD 3000 integrated graphics more than capable, but it beats out the dedicated graphics option in the ThinkPad T410 we reviewed earlier this year.

Moving past the improvements with graphics, the main draw for many users to the Sandy Bridge platform is the faster SATA connection speeds. The ThinkPad T520 supports the latest SATA III 6.0Gbps connection speeds, which are needed to truly take advantage of the current-generation SSDs. In many cases, performance doubles, with drive speeds previously topping out at 250MB/s, now reach as high as 500MB/s. For the enthusiast user, SATA 6.0Gbps speeds are undoubtedly a must.

In our first look there was some initial confusion on of the Lenovo ThinkPad T520 supported SATA 6.0Gbps speeds. During our prep where we clone the stock drive to the hard drives and SSDs we review with the system, we had also upgraded the Intel RST drivers to the latest version. In our hast we didn’t reboot the system before our quick CrystalDiskMark benchmark, and saw the drive (an Intel SSD 510) running in a 3.0Gbps mode. We are glad to say this problem as not been repeatable and for the duration of the full-review everything as been running at the speeds it should be.

The benchmarking of the Lenovo ThinkPad T520 is split up in two sections; stock configuration and upgrade configurations. In the first part we review the system as shipped to us by the manufacturer, whereas in the later part we re-benchmark the notebook using a selection of set drives.

By far the coolest feature of the ThinkPad T520 is the mSATA/WWAN slot located underneath the keyboard. Our review unit came equipped with the 80GB Intel SSD 310 working as the boot drive, keeping the primary 2.5-inch storage bay open for additional storage or scratch space. Lenovo included a low-profile 320GB Seagate Momentus Thin to fill the empty bay, although we didn’t include it in our tests as it wasn’t used for the OS or any applications on our configuration.

Our Lenovo ThinkPad T520 included the standard six-cell battery option, offering a 57Wh capacity. A larger nine-cell battery with a capacity of 94Wh is also offered, which would add about 60% onto your overall battery life. The biggest difference between each of these batteries is their respective sizes, with the smaller six-cell mounting flush to the back of the notebook, and the larger nine-cell battery sticking under an inch.

An optional “slice” battery is also offered as an option for the ThinkPad T520, which when combined with a 9-cell battery boasts an impressive 24-hours of runtime. Sadly, we were unable to get a slice-battery with our review unit, so we are unable to provide measured runtimes of that configuration.

Using the above conditions, the ThinkPad T520 stayed on for 6 hours and 59 minutes, with an average power consumption of 6.2-7 watts. Compared to our original estimate of over 11 hours, it appears the battery gauge wasn’t as accurate as a stopwatch.

The Lenovo ThinkPad T520 proved itself to be worthy notebook for business-users and enthusiasts alike. Featuring the latest Sandy Bridge components, the T-series offered excellent battery life while still knocking our socks off in system performance. Integrated graphics performance has substantially improved over previous generations, now reaching over 5,000 in 3DMark06. If that isn’t enough for you, the NVIDIA NVS 4200M dedicated graphics is also an option. Depending on your budget, Lenovo offers a wide selection of second-generation Intel Core-series processors in the T520, ranging from the 2.1GHz Core i3-2310M up to the quad-core 2.3GHz Core i7-2820QM.

Overall the ThinkPad T520 has plenty to offer, with a configuration matching any budget. Our only big complaint is the less than appealing port selection offered on the T520. No high-speed data connections are included on this model, with eSATA only being offered on the T420 or W520. The other alternative is USB 3.0, which is only present on the W520. If you can get past that downside, the T520 is a very solid performer.

The Lenovo ThinkPad T520 has plenty to offer for a wide range buyers. If shopping on a tight budget, a base configuration with integrated graphics and a WXGA resolution screen starts at only $819. For enthusiast buyers with performance in mind, NVIDIA NVS 4200M dedicated graphics, a quad-core CPU, and a Full-HD 95% gamut LED-backlit display options are ready and waiting. No matter what path you take, you get a solidly built notebook with a great keyboard… although just one color; black.

We expect to hang onto the Lenovo ThinkPad T520 for a few additional weeks. If during this time you have any special requests (i.e., benchmark another drive or perform additional tests) we are more than willing to help in our discussion forum.

Simultaneous to the T420, we also looked at a 15.6 inch model from the T520 range. Here, the only significant change in comparison to the T510 is also the hardware refresh with the new Sandy Bridge processors from Intel.

Our test device"s exact name is T520 4240-4CG. An Intel Core i5 2410M CPU supplies the adequate computing performance inside. Either an NVIDIA NVS 4200M graphics card or solely the Intel HD Graphics 3000 integrated in the processor takes care of pixel calculations (Optimus). A four gigabyte DDR3 main memory and a fast 500 GB hard disk with a revolution speed of 7200 rpm complete the configuration.

The T520"s immediate opponent is found in Dell"s Latitude E6520, which can be configured at most with an i7 and the NVS 4200M graphics card as well. Unlike Lenovo, Dell uses a new look. We hope to provide you with all details in this review.

In regards to design, we have had this case in review a few times before. Starting with the T500 over the T510 up to the latest T4x0 series, Lenovo couldn"t compel to make any surprising design modifications in the current T520, except for minor ones. Considered by itself, sticking to the tried and tested isn"t at all bad, but innovations don"t stop in case design. And compared to the competition, you would think that a high-priced laptop such as the T520 would, in a sense, deserve a complete metal case now, though.

Instead, Lenovo still sticks to the plastic look & feel. Nevertheless, the T520, practically dressed entirely in black has a certain air of elegance and the matt slightly roughened surfaces have a pleasant feel anyway.

Two USB 2.0 ports and the eSATA/USB 2.0 socket are located on the left edge"s center. In addition, there is an IEEE 1394 (FireWire) port in the front area. It is mainly used for fast data exchange between the computer and multimedia or other peripheral devices, for example video cameras. Both video interfaces, analog VGA and a digital display ports, are also placed on the left edge center. Thus, left-handed users are definitely disadvantaged depending on what"s in use.

It looks better on the right. There is a 4in1 cardreader, which supports SD, SDHC, SDXC and MMC formats, and an ExpressCard34 slot, which makes it possible to extend the T520"s functionality. The combo audio port, the optical drive, an RJ45 for connecting the laptop to the Ethernet and a Kensington Security slot follow towards the rear.

Apart from the Kensington Security lock for physical securing against theft, the T520 is also equipped with a fingerprint reader among other things. A splash water proof keyboard and a shock proof hard disk protect the system against data loss in case of the corresponding mishap.

Appropriate for a business device, Lenovo equips the T520 with a matt screen and thus meets the requirements placed on display workstations. Alike the predecessor, three alternatives are available, all in a 15.6 inch, 16:9 size and with a built-in antenna for a broadband modem. The potential buyer is spoilt for choice with HD, that is 1366x768, HD+, that is 1600x900 or FHD, that is 1920x1080 pixel resolutions.

The Thinkpad T520 is based on the QM57 chip set. It"s offered with a range of second generation Core i processors, called Sandy Bridge. The performance spectrum ranges from various Core i5 CPUs up to the Intel Core i7 2820QM quad core processor.

Our T520 test laptop is at the start with a Core i5 2410M CPU. It is a midrange dual core processor. It can process up to four threads at the same time due to Hyper Threading. Its base clock rate of 2.3 GHz can be increased to 2.6 GHz (2 cores loaded), respectively 2.9 GHz (1 core).

Our performance tests were all executed with the NVIDIA NVS 4200M, which has been installed in the fully equipped Thinkpad T520 at hand. For comparison, the same chip, with a lower clock rate, was used in the recently reviewed Dell Latitude E6420.

The business graphics card positions itself in the entry level range in terms of 3D performance. The NVS range is especially optimized for stability and business applications. The NVS 4200M also supports PureVideo HD (VP4) for decoding HD videos (H.264, VC1, MPEG-2, Full Spec Blu-Ray Decode). Monitors with a resolution of up to 2560x1600 pixels can be connected via the display port. One gigabyte of DDR3 RAM are tethered to the 64bit wide memory bus.

Let"s look at our Cinebench test results once more. But this time at the shading rate, which assess the graphics card"s OpenGL performance. Our test system can score 5355 points in the Cinebench R10 64 bit Shading Test. Thus, the T520 positions itself in the immediate vicinity of laptops with a GeForce GT 540M or even Radeon HD 6550M graphics card in our database. So, it exceeds the Latitude E6420 that reaches 4471 with the same, but lower clocked graphics card and weaker processor, with surprising clarity.

It looks different in the 3DMark tests. The E6420 and our T520 are on the same level throughout the tests. The graphics chip places itself in the range of a GeForce 320M, respectively GT 130M in the 3DMark06 test (1280x1024). Interestingly, even the incorporated Intel HD Graphics 3000 can come close to the 4000 point mark, depending on the test configuration.

Our T520 has really not been designed for CAD applications. A look at the SPEC Viewperf 11 benchmarks proves this. The T520 can again surpass the Latitude E6420 across the board, but the overall performance remains in the lower field of our database, just before the NVS 3100M. Graphics solutions from the Quadro FX or FirePro category supply a multiple of performance here.

The T520 doesn"t show any irregularities in use with low load and stays at a constant noise level of 32.5 dB(A). It can be perceived as a low pitched noise. The fan noise remains on an idle level for a long time when the load is increased, for example in 3D applications, only to turn up to 34.4 dB(A) later. A maximum noise level of a very audible 36.8 dB(A) can be reached.

We could do research on the internet for almost five hours via WiFi hotspot in brightness 12/15 and in energy savings profile in both practical tests. Movie entertainment ends after almost three hours in maximum brightness and "Video" profile.

The Thinkpad T520 thus represents a solid notebook with good application performance and, thanks to Optimus, good mobility qualities for business clients. It is definitely to be placed in the office field in view of performance. However, it"s not suitable for CAD applications despite the dedicated graphics card. But the Thinkpad W520 is designed for that and its review will follow shortly.

Today I am going to guide you through replacing the display of a Lenovo T520 Laptop. This particular laptop had some issues in that the display was humming in relation to screen brightness and had multiple dead LED"s.

At the time of this writing the replacement display is $50 US and is a LG LP156WH4 there are several displays that are compatible however we just went with the direct replacement.

There were 2 laptops that were turned back in on our last refresh that had some dead spots in the back light. As you can see by the picture the laptop on the left has been replaced, the laptop on the right is the one that I am going to replace the display in the video. I figured that as we had 2 out 15 that there are probably more people out there that are experiencing the same issue.

Special repairing tools are required for assembling or disassembling, as the Samsung Galaxy Tab Pro 10.1 LCD Display and Digitizer are hermetically attached.