Hello. i have a lenovo V530S-07ICB and a 55inch Samsung tv as monitor. it is 4k. 3840x2160 When i look in refreshing rate i can only go to max 30. But my levanto has the possibility to go to 60. why is it not possible for me to go higher then 30?
Per the Overview document for your laptop (here: https://psref.lenovo.com/syspool/Sys/PDF/Lenovo/Lenovo_V530s_07ICB/Lenovo_V530s_07ICB_Spec.pdf), 30Hz is the maximum rate supported for a HDMI connection. This is specifically Lenovo's fault. They had the ability to deliver a better HDMI signal, but chose to take the cheap road and did not do so.
If you have an available DisplayPort interface, you can use a DisplayPort-to-HDMI adapter to connect the TV and achieve 4K@60Hz. Understand, however, that you cannot use just any DisplayPort-to-HDMI adapter; you need to use one that specifically states that it supports 60Hz with a DisplayPort 1.2 signal. Many adapters say that they support 60Hz, but actually require a DisplayPort 1.4 signal in order to do so - and you do not have DisplayPort 1.4 support in your processor.
Hope this helps,