Screen goes to black randomly. Overload process. MacOS error: -67050 (MacBook Pro High Sierra)

Hi Apple community,

I would like to share with you a problem that I am having in my MacBook Pro, in case someone can help:

 Identificador del modelo: MacBookPro13,2

 Nombre del procesador: Intel Core i5

 Velocidad del procesador: 2,9 GHz

 Memoria: 16 GB

SO: High Sierra 10.13.6

A few days ago, my screen began to go black intermittently and randomly, apparently for no physical reason. It seems that a process is overloading the CPU but I can't see what it is.

This it is not reproducible when starting in "safe mode"

It happens even before "loging in" with my user.

During theses days after the problem happened for first time I have also observed some crashes, but not so many. The screen going in and out to black happen almost always, so I cannot see the relation between crashed and screen/CPU problem.

EtreCheck logs is showing this major issue:

Runaway processA process is using a large percentage of your CPU.

Top Processes Snapshot by CPU:

    Process (count) CPU (Source - Location)

    Other processes 217.61 % (?)

    Console 57.31 % (Apple)

    Google Chrome 22.91 % (Google, Inc.)

    trustd 14.71 % (Apple)

    EtreCheck 4.65 % (App Store)

But I don´t know how which processes could be involved in this 217.61 % that is overloading the CPU and seems to be related with the screen going to black.

This is the list of crashes I had during these days while the screen problem was:

MacBook-Pro-de-Mila:CoreCapture mila$ ls -ltr

total 0

drwxr-xr-x 4 root wheel 128 29 abr 23:53 [2020-04-29_23,53,26.021688]=WiFiDebug~PRE[B6ACF]

drwxr-xr-x 4 root wheel 128 29 abr 23:53 [2020-04-29_23,53,28.907744]=WiFiDebug~POST[B6ACF]

drwxr-xr-x 4 root wheel 128 30 abr 01:16 [2020-04-30_01,16,42.136092]=WiFiDebug~PRE[CF165]

drwxr-xr-x 4 root wheel 128 30 abr 01:16 [2020-04-30_01,16,45.933843]=WiFiDebug~POST[CF165]

drwxr-xr-x 4 root wheel 128 2 may 12:09 [2020-05-02_12,09,43.731725]=DeauthInd{sts:0,rsn:7}

drwxr-xr-x 4 root wheel 128 2 may 12:09 [2020-05-02_12,09,48.504864]=AssocFail{sts:5,rsn:0}

drwxr-xr-x 4 root wheel 128 2 may 12:09 [2020-05-02_12,09,48.799145]=RoamFail{sts:1,rsn:2}

drwxr-xr-x 4 root wheel 128 2 may 12:09 [2020-05-02_12,09,57.122927]=AuthFail{sts:5,rsn:0}

drwxr-xr-x 4 root wheel 128 2 may 19:00 [2020-05-02_19,00,49.884417]=WiFiDebug~PRE[42941]

drwxr-xr-x 4 root wheel 128 2 may 19:00 [2020-05-02_19,00,53.135694]=WiFiDebug~POST[42941]

As it can be seen, today 3rd of may there is no crashes, but the screen problem persists.

From console I observe errors in processes with message:

MacOS error: -67050

amfid, eccd, quicklook, EtreCheck, system_profiler.

I attach complete Etrecheck report

In the video I showing an exemple of the error, this is the worst case, sometimes I had the screen more estable:

https://www.youtube.com/watch?v=VpSgUURnesM

Thanks in advance for reading me, any help or indication from your side is very appreciated.

Mila