I noticed that about 98 % sonometres on the market most likely use the same IC as usually as they are all upper-limited to 8-8,5 kHz. Human ear works up to say 18 kHz. So these things do not measure over half the spectrum? Isn't it more accurate to guess than?
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Less jewellery, more gold into electrotech industry!
Half of the computer problems is caused by bad contacts 
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good night! I have this screen that looks half black and half white. the tcon gives a low vgh value (5-6v). the rest seem fine. I first removed the flex from one half of the panel and then the other. Removing the left, vgh increases it to 25-26v. I think the problem is in that area, but there are not many elements on the integrated controller board. there are no shorted capacitors. could they be a cof? Some help?
By the way, now the entire screen is black. Maybe some flex was not connected correctly... I have exchanged the flex and there are no variations, I don't think they are the... -
I found another post on this site the other day which has been very helpful in troubleshooting this issue I am having with my tv. The left half of the screen is dark, and the other half is VERY slow to generate it's image - and it only generates part of its image at that.
Based on this yt video, I have narrowed it down to an issue (short?) on the left side of the display, somewhere in the system of ribbon cables.
when I remove the bezel and the rear cover, I can get the image to display correctly by manipulating the ribbon cables on the left side which connects the left lower display... -
I raised the question of whether PWM on the power board "dim" pin would be a reasonable assumption for controlling the backlight of a Philips TV (55put6101/12): https://www.badcaps.net/forum/troubl...d-tv-backlight. I didn't receive any insights there so I went ahead and tried it.
The setup is basically:
Rpi3 hardware PWM → 220 Ohm → NPN transistor → dim pin
Transistor is switching the 3.5 V supply on the power board.... -
The 55" LG has been in the basement for a few months without being used. Turned it on yesterday, set came on as it should and showed a complete screen for about 5 seconds (was on a broadcast channel but no antenna was connected), then the screen went mostly dark with about 1/3 of the screen on the right lighting up with brighter lines in that lit part (sorry, no pictures of that). Power LED was cycling too, preventing the TV from fully powering up.
Pulled the back off, all boards looked OK. Pulled the LED connector, turned the set on to see if it would power up but I don't belive it... -
Hi folks,
I have got an MSI RX 470 ARMOR 4GB GPU with a problem and I dont know where can I start repair and if it is worth it.
The card erlier life is unknown.
The problem is that: when I start gpu test (Furmark Heaven Benchmark) no problem - no artifacts or something - but after a little time and then the pc is rebooting.
I tested the gpu with tserver:
The test with maxmimum memory frequency is OK
./agt -mem=1650
./tserver -boardtest=memfa
But, if I increase the engine frequency I have got error. Whit this parameters the...
