Hi @gusreiber,
Usually there's a part number on the LED strip that you can use to search online for. Normally individual LEDs aren't replaced, the whole strip is and if you're going to replace one strip then perhaps it is better to replace the lot as some LEDs have already failed and the others may not be that far away from doing the same.
Replacing individual LEDs on a strip may be problematic as you would need to know the exact specifications of the LED itself so that when you replace it (them?) there's no noticeable difference between that part of the screen and the rest of the screen.
Perhaps also check on the back of the LCD panel itself for a make and model number for the panel.
Normally panels are made by specialist LCD panel manufacturers to order and not by the manufacturer of the monitor. If there is a make and model number, then search for (insert make and model number) datasheet to hopefully find it as it will have the specifications of the panel. Maybe not the LEDs themselves but usually their power consumption value, voltage requirements etc which may help.
crwdns2934105:0crwdne2934105:0
crwdns2934113:0crwdne2934113:0
crwdns2915270:0crwdne2915270:0
crwdns2889612:0crwdne2889612:0
1
crwdns2944067:02crwdne2944067:0
I spoke to a local tech repair place who has suggested that the gradual decline of the backlights suggests that a failing capacitor is likely my culprit. Regardless, I also have a path to information through Dell support, assuming the Support ID sticker is still on the machine somewhere.
Assuming that pans out, I will update my post here with part numbers from Dell support. Thx to Bothell 1 Hour Repair for some diagnostics.
crwdns2934271:0crwdnd2934271:0 Gus Reiber crwdne2934271:0
Dell is no help now that the service window has expired. I am still looking for more information on the LCD panel following up on @jayeff's wisdom:
--> Sharp brand LQ695D3L02
I have opened the device and opened up the power supply hoping to find an obviously bad capacitor. I was not so lucky, but I now have a part number for the power-board:
--> PN: 790LR1400100R00 HBN10AA005AK 1726 Rev:A00
--> 491A011T1400H06
I haven't been able to find any additional details on this part, but again posting here to consolidate information.
Anyone know how I can test the power-board in isolation?
crwdns2934271:0crwdnd2934271:0 Gus Reiber crwdne2934271:0