Dell E178fp intercepted on the way to e-waste, manufactured in 2007.
Initially at power on the DELL warm up screen would appear dimly for a second or two and then it would blank. At best, other times it would just start black. Disassembled and found the power supply and video board shown front and back in the attachments. The PS board had 4 Capxon electrolytic capacitors of which the biggest two (c203 and c204 on the right side) were domed and one of the smaller ones (c16, near F151 at the left) had blown its plug. Replaced them with Panasonics. Reassembled, and it powered up and lit.
However, the image has problems (see the attachment). The video board has 2 X Teapo 330uF 16V, 8 X G-Luxon 22uF 25V and 1 X Teapo 100uF 25V. Is the image defect shown consistent with some or all of these being bad? They all look ok, but as I understand it, none of these are very good capacitors. Measured the voltage at pin 1 on the power supply and it was 5.1, which is the value stamped on the motherboard. So I think the PS board is OK now and this problem is either in the video board, or I suppose it could be in the panel itself. The horizontal lines follow the color rectangle around the screen and appear in all positions. The Moire pattern is from the camera image, it isn't visible by eye.
Initially at power on the DELL warm up screen would appear dimly for a second or two and then it would blank. At best, other times it would just start black. Disassembled and found the power supply and video board shown front and back in the attachments. The PS board had 4 Capxon electrolytic capacitors of which the biggest two (c203 and c204 on the right side) were domed and one of the smaller ones (c16, near F151 at the left) had blown its plug. Replaced them with Panasonics. Reassembled, and it powered up and lit.
However, the image has problems (see the attachment). The video board has 2 X Teapo 330uF 16V, 8 X G-Luxon 22uF 25V and 1 X Teapo 100uF 25V. Is the image defect shown consistent with some or all of these being bad? They all look ok, but as I understand it, none of these are very good capacitors. Measured the voltage at pin 1 on the power supply and it was 5.1, which is the value stamped on the motherboard. So I think the PS board is OK now and this problem is either in the video board, or I suppose it could be in the panel itself. The horizontal lines follow the color rectangle around the screen and appear in all positions. The Moire pattern is from the camera image, it isn't visible by eye.
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