thinkpad 450s lcd touch screen repalcement free sample

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Let the games begin! Equipped with an Nvidia GeForce 940M, the ThinkPad T450s can cope with 3D applications and games - and that for a relatively low extra charge. Thanks to a 96 Wh battery capacity, record-breaking runtimes should be possible.

In this review, we will re-examine the recently reviewed ThinkPad T450s, which is now configured with a Core i5 processor and GeForce 940M graphics from Nvidia. The screen (14-inch, Full HD IPS) and memory configuration (12 GB of RAM) are the same as in our first review sample. Only the installed SSD is smaller with 256 GB rather than 360 GB. With a purchase price of approximately 1300 Euros (~$1450), it is 100 Euros (~$111) cheaper than the i7-model. An identical configuration, without a GeForce GPU costs about 80 Euros (~$90) less.

We will not re-examine the casing, connectivity, wireless options or input devices here, since we have dealt extensively with these points in our first review of the T450s. However, we would like to point out two special features of the present device:

Firstly, the GeForce model of the ThinkPad does not have a SmartCard reader or docking port - it cannot be said with absolute certainty whether this is a technical limitation or product policy strategy. Secondly, we would like to note that the standard 24 Wh battery has been replaced with the optional 72 Wh model (plus 50 Euros; ~$56) in this test. Together with the internal 24 Wh secondary battery, the total capacity increases from 48 Wh to 96 Wh. However, the bulky 6-cell model lifts the laptop"s rear by about one centimeter (~0.4 in), and boosts its weight by almost 200 grams (~7 oz).

Although the screen is identical to the model in our first review sample (LG LP140WF3-SPD1), we re-assessed the brightness and contrast to determine possible production fluctuations. Our new sample now reaches rates of 281 cd/m² and 1007:1 rather than 268 cd/m² and 1110:1 - these minor tolerances can be viewed as normal. Therefore, the quality of the Full HD IPS screen that Lenovo has selected belongs categorically to the premium range, and scores with a decent color reproduction, extremely generous viewing angles, and unrestricted outdoor suitability. Again, we would refer to our previous test report for further details.

Disregarding the utilization of expensive 16 GB modules, our review sample already has the maximum memory configuration of 12 GB of RAM (4 GB on-board, 8 GB inserted). A somewhat aggravating limitation - rivals such as the EliteBook 840 G2 can be upgraded by up to 16 GB thanks to two DIMM slots. At least the T450s has an empty M.2 slot in case the capacity of the 256 GB, 2.5-inch SSD is exhausted at some point.

Owners of the former T440s model considering upgrading to the latest T450s should be prepared for marginal performance gains of 10 to 20%. In some cases, the even older ThinkPad T430s is faster because the manufacturer had installed standard voltage CPUs from the 35-watt category. This highlights the trend that has been changing the entire laptop world for some years - new devices are not getting stronger, but increasingly more compact, economic and enduring.

Even without an i7 processor, the T450s is a high-performance office device. Not only does it cope with standard routine applications, but also deals with many high-requirement programs at a satisfactory speed. Only excessive multitasking or extremely CPU-heavy software pushes the dual-core CPU to its limits. However, the higher clock of an i7-5600U would only help conditionally here. Fortunately, Lenovo has an alternative ThinkPad T440p with quad-core CPUs in its lineup for this user group.

Unexpectedly, the GeForce 940M does not have a negative impact on the noise development of the T450s. Even in 3D applications and our stress test (Prime95 + FurMark) the fan spins so slowly that the operating noise reaches approximately 34 dB(A). This places our review sample on par with the model with integrated graphics.

Usually the ThinkPad does not need active cooling while idling or during simple routine use (browsing, office, video playback) and operates almost silently. "Almost" because a quiet, electronic hum is occasionally heard from the inside. However, this is not audible at a normal working distance of approximately 50 centimeters (~20 in).

Thanks to Optimus support, the GeForce 940M does not increase the power consumption unnecessarily while idling. The T450s is satisfied with just 3.1 watts in minimum screen brightness. A higher brightness enabled Wi-Fi modules and the Windows "High-Performance" mode boost the power consumption up to 9.6 watts.

As in many other ThinkPads, Lenovo"s "Power Bridge" system that is comprised of two batteries is used in the t450s. One has a capacity of 24 Wh and is inside the casing. The other can be inserted into the device"s rear. The standard model also adds 24 Wh, but the manufacturer also offers larger models with 48 Wh (+30 Euros; ~$33) or 72 Wh (+50 Euros; ~$56). The total power capacity can thus be doubled from 48 up to 96 Wh. However, the latter two batteries also increase both height and weight.

Our 96 Wh review sample achieved twice the runtimes of the 48 Wh configuration, which is probably due to the improved energy saving features of Windows 8.1 (Windows 7 Professional was installed in the first test). Depending on the application scenario, the T450s lasted between 4 and 31 hours away from the outlet - a more than impressive outcome. Runtimes of approximately 11 to 12 hours will still be realistic with a screen brightness of approximately 150 cd/m² and normal load. Recharging took about 4 hours.

Most users will easily dispense with the at best 20% higher performance of the expensive Core i7-5600U - anyone needing that last bit of CPU power, should opt for the T440p from the outset. The GeForce 940M doubles the ThinkPad"s 3D performance and does not push the purchase price or the emissions to unreasonable heights.

If the feature is still not back, open Device Manager -> Human Interface Devices. Right-click HID compliant touch screen, then uninstall. When you restart the PC, it will reinstall.

If you cannot locate a USB Touchscreen Controller(A111), look for a USB Root Hub (xHCI) option under USB Controllers or Universal Serial Bus. If labeled as disabled (a faded or lighter shade of gray), then right-click the option and select enable. Check to see if that brings the touch screen back.