Re: Sceptre X9G-Komodo II* blinking power light
Hi again all,
Thanks in advance to anyone who returns to this thread to refresh their memories & help out. I'm sorry it has been almost 2 months since my last post here--quite a bit has happened (family/medical stuff, increased load @ work due to layoffs, etc.).
First off, a related & somewhat funny story: I broke down & purchased a replacement power board for my monitor from Sceptre for $65 shipped (rip-off, I know). I now had a working original, a working replacement, and a defective original. The new IC board had the same markings, but their were some discrepancies in the components (larger caps, some appear to be omitted, etc; pics attached after the break). Most of the voltage readings I could get were the same as the original board.
In the process of testing, I lost focus and let one of my multimeter leads slip. There was a bright flash and a loud bang that freaked out the wife & dog across the house. When I got my vision back, I realized that I had fried something on my new, expensive board.
Before continuing work on the original, I'd like to fix the brand new one (since the problem is a tad more obvious).
Front & back images of the new & old boards are attached. The damage (pictured) on the new board seems to be on F101, right above the power plug (pics of the component, and its through-holes after removal).
I'm pretty sure this is a fuse? I could strip more of the insulation off of it if it would help ID its rating, or is there another way to determine that?
Other, less pressing information:
- D1, D2, D4 all read .44 volts, and D3 reads .21 volts on old & new boards. The new board looks to be missing D2 and D5 (along the top of the back pics), but doesn't seem to affect operation.
- C105 (the big cap) read a steady 155 volts on the new board, when it worked (unless i didnt test long enough). On the old one, it starts around 160 volts, then gets up to 200 volts or more after a minute or so of juice.
- The 4 large caps standing up along the right side, from bottom to top, are C114, 115, 117, 118. C117 and 118 were both 5 volts on old & new boards. C114 and 115 were 14 volts on the old one and 17 volts on the new. Hard to tell from pictures, but 114 and 115 are the same size as 117 and 118 on the new board; they are slightly shorter on the old board.
In short, for those who find this forum from Google because you have the same problem, you could probably get a replacement board from Sceptre if you ask and want to pay for it. You'll need the serial from a barcode sticker on one of the vertical metal pieces.
I am still eager to fix my (now 2!) IC boards, hopefully before my lone working Sceptre LCD dies!
Happy Thanksgiving to all.
-Will
Hi again all,
Thanks in advance to anyone who returns to this thread to refresh their memories & help out. I'm sorry it has been almost 2 months since my last post here--quite a bit has happened (family/medical stuff, increased load @ work due to layoffs, etc.).
First off, a related & somewhat funny story: I broke down & purchased a replacement power board for my monitor from Sceptre for $65 shipped (rip-off, I know). I now had a working original, a working replacement, and a defective original. The new IC board had the same markings, but their were some discrepancies in the components (larger caps, some appear to be omitted, etc; pics attached after the break). Most of the voltage readings I could get were the same as the original board.
In the process of testing, I lost focus and let one of my multimeter leads slip. There was a bright flash and a loud bang that freaked out the wife & dog across the house. When I got my vision back, I realized that I had fried something on my new, expensive board.
Before continuing work on the original, I'd like to fix the brand new one (since the problem is a tad more obvious).
Front & back images of the new & old boards are attached. The damage (pictured) on the new board seems to be on F101, right above the power plug (pics of the component, and its through-holes after removal).
I'm pretty sure this is a fuse? I could strip more of the insulation off of it if it would help ID its rating, or is there another way to determine that?
Other, less pressing information:
- D1, D2, D4 all read .44 volts, and D3 reads .21 volts on old & new boards. The new board looks to be missing D2 and D5 (along the top of the back pics), but doesn't seem to affect operation.
- C105 (the big cap) read a steady 155 volts on the new board, when it worked (unless i didnt test long enough). On the old one, it starts around 160 volts, then gets up to 200 volts or more after a minute or so of juice.
- The 4 large caps standing up along the right side, from bottom to top, are C114, 115, 117, 118. C117 and 118 were both 5 volts on old & new boards. C114 and 115 were 14 volts on the old one and 17 volts on the new. Hard to tell from pictures, but 114 and 115 are the same size as 117 and 118 on the new board; they are slightly shorter on the old board.
In short, for those who find this forum from Google because you have the same problem, you could probably get a replacement board from Sceptre if you ask and want to pay for it. You'll need the serial from a barcode sticker on one of the vertical metal pieces.
I am still eager to fix my (now 2!) IC boards, hopefully before my lone working Sceptre LCD dies!
Happy Thanksgiving to all.
-Will
Attached Files
It's definitely not a CCFL issue as the display works fine with a working inverter board, but the more I read that thread, the more I feel this board is showing symptoms of a defective MOSFET.
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