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Lenovo ideapad S540 14IWL - HDMI port does not work

2019-10-04, 18:38 PM

So I bought  a new s540 without an os. Installed Windows 10, ran automatic updates, installed other drivers manually etc...

When I connect the laptop to an external monitor nothing happens - trying on different monitors and cables.

I thought I had a damaged product so went back to the store for a replacement. A few days later I got the replacement - same exact problem. The sales representative said it is probbly a problem with the whole line. Is that so? I just returned it to get my money back. Is it a known problem? I see that I'm not the only one having this problem. I've been a Lenovo user for most of my life and would like to remain one. Can you please suggest a fix? I'm not going to buy another s540 / ideapad model until I can find a solution. 





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Re: Lenovo ideapad S540 14IWL - HDMI port does not work

2019-10-05, 11:27 AM

Lenovo’s Ideapad lineup combines a wide variety of devices. Some of them are extremely cheap, while others – can cost a pretty penny. Well, the Ideapad S540 (15″) sits somewhere in the middle but is placed more towards the premium Ideapads. Even from the first sight it looks significantly improved, compared to its predecessor – the Ideapad 530s.

Today, we are taking a look at the all-AMD version of the device. It includes the new AMD Ryzen 5 3500U / Ryzen 7 3700U and respectively the RX Vega 8 and RX Vega 10 in terms of graphics cards. It also features a Full HD IPS panel, speakers that are surrounding the keyboard and a lot more.

Design and construction
Lenovo has deliberately increased the premium feel on this device, compared to its predecessor. Not only it features mostly aluminum on its body, but now it is marginally thinner and fairly lighter – 15.9mm and 1.63 kg. This makes it easier to handle around – however, it is still significantly heavier than the 1.12 kg of the ASUS ZenBook 14 UX433.

Sadly, its lid cannot be opened with a single hand. Additionally, the design features slim bezels and Lenovo has managed to put the camera on the orthodox position above the screen.


Then we have the base of the device. It is home to a MacBook style speakers, that are firing towards the user. This is a feature we would like to see on more devices since it is more convenient if you place it on the pillow or blankets. Between the pair of speakers, you can see the keyboard. It is a little of a setback because the key travel is incredibly short. تیرآهن ذوب آهن  On the bright side, it has clicky feedback and a backlight, however, we think it would have been very easy for Lenovo to put a better keyboard with a longer key travel since they have already done it on a significantly thinner device – the Ideapad 730S.


Further below there is the touchpad which has a glass cover on top of it and is fast and accurate. Moreover, on its right, you can see the fingerprint reader which is pretty snappy.


With the speakers moved to the surface, there are only the ventilation grills on the bottom plate. Heat, as expected, is exhausted from in between the base and the display of the laptop.


The Ideapad S540’s I/O has some essentials, but it lacks others (no RJ-45 connector). On the left side is located the barrel-style charging plug (we would have loved to see a Type-C charging), an HDMI connector, USB Type-C 3.1 (Gen. 2) port, and an Audio Jack. Looking on the right, there are two USB 3.0 ports (one of which has an Always-On functionality), an SD card reader and the reset switch.

Display quality
Lenovo Ideapad S540 (14″)’s display has a Full HD IPS panel, model number LG LP140WFA-SPD1 (LGD05EC). Its diagonal is 14″ (35.56 cm), and the resolution – 1920 х 1080. Additionally, the screen ratio is 16:9, the pixel density – 157 ppi, their pitch – 0.161 x 0.161 mm. The screen can be considered Retina when viewed from at least 56 cm (from this distance, the average human eye can’t see the individual pixels).


It has comfortable viewing angles. We have provided images at 45 degrees to evaluate quality.


The maximum measured brightness is 250 nits (cd/m2) in the middle of the screen and 249 nits (cd/m2) average across the surface with a maximum deviation of 11%. The Correlated Color Temperature on a white screen and at maximum brightness is 7825K (average) – colder than the 6500K optimum for sRGB. The average color temperature through the grey scale before profiling is 7700K.
In the illustration below you can see how the display performs from uniformity perspective. The illustration below shows how matters are for operational brightness levels (approximately 140 nits) – in this particular case at 66% Brightness (White level = 140 cd/m2, Black level = 0.14 cd/m2).
Values of dE2000 over 4.0 should not occur, and this parameter is one of the first you should check if you intend to use the laptop for color-sensitive work (a maximum tolerance of 2.0 ). The contrast ratio is acceptable – 980:1.


To make sure we are on the same page, we would like to give you a little introduction to the sRGB color gamut and the Adobe RGB. To start, there’s the CIE 1976 Uniform Chromaticity Diagram that represents the visible specter of colors by the human eye, giving you a better perception of the color gamut coverage and the color accuracy.

Inside the black triangle, you will see the standard color gamut (sRGB) that is being used by millions of people in HDTV and on the web. As for the Adobe RGB, this is used in professional cameras, monitors, etc for printing. Basically, colors inside the black triangle are used by everyone and this is the essential part of the color quality and color accuracy of a mainstream notebook.

Still, we’ve included other color spaces like the famous DCI-P3 standard used by movie studios, as well as the digital UHD Rec.2020 standard. Rec.2020, however, is still a thing of the future and it’s difficult for today’s displays to cover that well. We’ve also included the so-called Michael Pointer gamut, or Pointer’s gamut, which represents the colors that naturally occur around us every day.

The yellow dotted line shows Lenovo Ideapad S540 (14″)’s color gamut coverage.

Its display covers a narrow 52% of the sRGB/ITU-R BT.709 (web/HDTV standard) in CIE1976.


Response time (Gaming capabilities)
We test the reaction time of the pixels with the usual “black-to-white” and “white-to-black” method from 10% to 90% and vice versa.



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Re: Lenovo ideapad S540 14IWL - HDMI port does not work

2019-11-02, 12:09 PM

I just solved this issue. After installing Windows and all updates and drivers (since I bought a freeDOS) I could not get the hdmi to work. After reading the forums, I went into BIOS settings, under BOOT, and changed "Legacy Boot" to "UEFI". Started up the Laptop and hdmi was working perfectly!

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