I got 4 of these in with no back light. The TDK TBD292LF EA02B292T PK07V00330I A668.TBD292LF.TDK XinE 2 inverter has quantity 10 of 100uf 35v 105*C (NK CON) WK CON EVL series capacitors. EVIL they are too. The first two monitors I fixed by replacing bulged caps C34, C35, C36, and C38 which get burned up by Q6 and Q4. I left the remaining non bulged caps. All I could find at the time was some 100uf 25v 85*C 2000 hour Nichicon VR caps. These ended up working fine for more than a year and were not damaged when removed. The other two monitors had the same 4 caps bad but they didn't work after fixing. MOSFETs Q6 and Q4 near the bad caps were shorted so I tried to swap in the NICO P2804BDG and P5504EDG from Q3 and Q5 to get one board working but it didn't. I didn't notice all the fuses on this inverter and I didn't have any good tools to remove the small stuff so I couldn't get any farther.
Nice detective work on the oddball MOSFETs at Need help finding replacement transistors and more possible replacement items for when the MOSFETs go at Electronics Forum: Acer AL2416W value of F2, then replace the Q4, Q6
Lately the AL2416 I kept starts dim and brightens within a few minutes. I thought this might normal CCFL operation but I decided to open it anyways to see how the substandard temperature caps are holding against the heat because spare boards are rare on eBay and letting the caps go bad for too long results in dead hard to find MOSFETs and who knows what else. The Nichicon caps were fine but now I have more caps and better equipment so I replaced them with some lower ESR 100uf 25v 85*C 2000 hour Chemicon SMG caps and greatly improved the soldering quality.
The power supply is equipped entirely with Rubycon YXG caps and the big semiconductors all have heat sinks. FSP100-4F01, FSP100-4F02, FSP130-4F01 look like good power supplies that won't see many capacitor failures. All caps tested great.
The AA668 VL-2401 REV:1C video board caps Lelon 220uf 16v and 22uf 16v tested fine. A few of the Chemicon 100uf 16v 105*C KMG caps tested a bit high so I replaced C159, C135, and C154.
So I put it all together and it flickers. Fortunately I notice that the flickering is affected by how I move the screen. I pull it back apart and the inverter cable is loose on both ends. My fault of course, but getting these connectors to seat is harder than it looks.
Yet another year later I hear a pop and see some steam out of the monitor. Even with one magic smoke released it kept on going. As a consumer I'd ignore this and forget to mention it to the service tech when the monitor finally goes. Knowing that the MOSFETs are at risk I cut power immediately.
Now the room smells like stale peanuts. Open it back up and the next 4 are going C1, C2, C3, and C39. The sleeves seem heat discolored compared to the remaining two C29 and C4. One has popped, one has bulged out the bottom, and the other two are as fine as they can be near the end of their life. It's a big monitor with a lot of lights that runs pretty hot and the 85*C SMG and VR caps are still going good and that's all I have so I put 4 more in and the monitor is back in operation.
It seems odd to me that the left and right side of the TDK inverter are probably the same circuit and the layout is different.
Nice detective work on the oddball MOSFETs at Need help finding replacement transistors and more possible replacement items for when the MOSFETs go at Electronics Forum: Acer AL2416W value of F2, then replace the Q4, Q6
Lately the AL2416 I kept starts dim and brightens within a few minutes. I thought this might normal CCFL operation but I decided to open it anyways to see how the substandard temperature caps are holding against the heat because spare boards are rare on eBay and letting the caps go bad for too long results in dead hard to find MOSFETs and who knows what else. The Nichicon caps were fine but now I have more caps and better equipment so I replaced them with some lower ESR 100uf 25v 85*C 2000 hour Chemicon SMG caps and greatly improved the soldering quality.
The power supply is equipped entirely with Rubycon YXG caps and the big semiconductors all have heat sinks. FSP100-4F01, FSP100-4F02, FSP130-4F01 look like good power supplies that won't see many capacitor failures. All caps tested great.
The AA668 VL-2401 REV:1C video board caps Lelon 220uf 16v and 22uf 16v tested fine. A few of the Chemicon 100uf 16v 105*C KMG caps tested a bit high so I replaced C159, C135, and C154.
So I put it all together and it flickers. Fortunately I notice that the flickering is affected by how I move the screen. I pull it back apart and the inverter cable is loose on both ends. My fault of course, but getting these connectors to seat is harder than it looks.
Yet another year later I hear a pop and see some steam out of the monitor. Even with one magic smoke released it kept on going. As a consumer I'd ignore this and forget to mention it to the service tech when the monitor finally goes. Knowing that the MOSFETs are at risk I cut power immediately.
Now the room smells like stale peanuts. Open it back up and the next 4 are going C1, C2, C3, and C39. The sleeves seem heat discolored compared to the remaining two C29 and C4. One has popped, one has bulged out the bottom, and the other two are as fine as they can be near the end of their life. It's a big monitor with a lot of lights that runs pretty hot and the 85*C SMG and VR caps are still going good and that's all I have so I put 4 more in and the monitor is back in operation.
It seems odd to me that the left and right side of the TDK inverter are probably the same circuit and the layout is different.
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