Why have they jumped these points and added FET to the bottom of my new x-main????
What is this????
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by howardc64Problem
This is an LG edge LED lit LCD Display. The LEDs are on the bottom edge of the display. There are 2 bars (left and right) Each bar has many LEDs and a 6 pin connector. Each pin drive several LEDs thus is the highest current flow / heat junction. The weak lead free solder gradually fails with thermal expansion/contraction cycling and increases resistance. PSU will compensate up to a point, then when the current is too high, PSU just shut down the backlight causing a dark display. I have even seen one which the connector just fell off as solder points became completely detached....-
Channel: Troubleshooting Computer Displays
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by novator2007Hello All,
I got a T460 with issue - No picture - Fan on full Speed and no Power LED Light.
Bios already reflashed
All standard voltage is present. CPU on emergeny(?) mode - max 30 c Grad.
By Schematc & BRD View I have found few Debug/Jtag points.
Just not sure which one is correct,
1.There is some(under lack) Test points near CPU - Schematic Page 6
2. J9 26p place for connector - Present: PCH_TMS/TDI/TDO/TCK/RSMRST
3. J8 26p place for Connector - XDP_TMS/TDI/TDO/TCK/RSMRST
I trying to find a correct... -
Hi,
I have a VIZIO E70-E3.
Symptoms: Black screen, no picture, but LED backlights are working.
I probed the power board and voltages are as listed on the board.
Main board appears fine, too.
I believe the problem is either a bad T-CON board, or connection to LCD, or bad LCD.
There are two separate ribbon cables feeding the LCD.
If both are connected, the screen is black.
If only the ribbon cable that feeds the right side of the screen (when viewed from the front) is disconnected, the left side of the screen shows picture and... -
by lmcancuHi is there a guide in this forum on how to test the LED backlight TV strips? I purchased an LED tester on amazon, but I am a bit confused on the test points and how to test the individual LEDs? I took apart a RCA 43" TV Rlded4331b. Please see attached pictures. I understand that all the LEDs are in series, but on these strips I don't see any individual test points for each LED? Any tips or guides?
Thanks in advance... -
Hello, a "hp 15s-eq0012np" arrived to me, the only problem with it is that the contact points on the "type C" charger input were torn off. Can anyone tell me what the purpose of each "leg" of the connector is? Which ones are really necessary for it to charge the battery and turn on?
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