Chosen Solution
Anyone have schematics or replacement for a Samsung LS32AM702UNXZA main board (BN41-02821A). I’ve tried the regular ebay, shopjimmys..etc.. and nothing .. Schematics would be very helpful. The TV keeps cycling - voltages to main board are steady so power board is fine, problem seems to be on t-con board
Hi @dgluck , Normally with Samsung TVs that have a separate tcon board, (I don’t know about monitors) there is a board mounted smd type fuse very close to the cable connector for the cable that comes from the mainboard, check if there is also power on it when the monitor is turned on. If there is power, then tcon boards do not cause on/off cycling problems. That is usually a mainboard problem (corrupted firmware perhaps?) or a power board problem. The tcon board is used to connect the video signals sent by the mainboard, to the screen and if it is faulty then there is no display or a weird display etc rather than a cycling problem, but again this is with TVs so maybe monitors are different. Here’s a link to the service manual that may help as it may have the schematic. Usually service manuals do. Unfortunately, you have to purchase it but at least it is available.
I agree with jayeff, cycling is indicative of power supply or mainboard problem. The power board is almost certainly your problem with bad/dried caps being my first check My exp with television CPU’s is manufacturers allow them to run HOT, but do not discount thermal cycling on the CPU…
