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Fix a Sceptre LCD Monitor
Page history
last edited
by MrTundraMan 13 years, 2 months ago
Fix a Dead Sceptre LCD Monitor
- Symptoms:
- Started with occasionally not powering on,
- Progressed to never turning on.
- Cheapo LCD monitor.
- Uses low quality capacitors or bad design - prone to failure.
- Mild smell of damaged caps.
- Procedure requires removing and replacing capacitors - needs soldering iron and solder.
- There only two screws to open case. They remove front. Comes off pretty easy.
- Display snaps out at sides.
- Display remains attached to metal frame. Don't unscrew from metal frame.
- Carefully pry along sides separating bezel from rear plastic piece.
- Unplug cable that goes to front bezel.
- Bezel should be set aside.
- Here's the screws in case you forget where they go
- Upper left - 2- attach back
- Upper right - 6 - attach base to back (don't need to remove, but it's easier
- Lower left - 2 - hold in power jack
- Lower right - 3 - hold in PCB
- Put screws in ziplock.
- Ground wire - remove screw. Wire is on lug.
- Reinstall screw for now to not lose it.
- Base after removing screws.
- Base attachment. I removed it, but it does not need to be removed.
- 4 cables - carefully slide out.
- Another cable on the other side.
- Stand up caps are bulged up at the top.
- Caps may have slight smell.
- Unsolder caps.
- White RTV looks like bathtub caulk. May need to carefully remove with xacto knife.
- Use solder sucker or wick.
- Don't bust nearby etches.
- Replace caps with new ones. Replacement part specs:
- 1000 uF, 16V part
- Higher voltage, same capacitance is OK.
- Low ESR caps used for switching P/S.
- Higher temp rating is much better, prefer 105 deg C over 85 deg C.
- Lead pitch, diameter and height important.
- Make sure polarity is right. It matters. A lot.
- Don't cause shorts.
- Mouser
- Removed caps close-up
- Parts were 105 deg C
- Note RTV stuck on the parts
- These are not all that old - date code looks like 38th week of 2005 (5 years to failure)
- Not sure what voltage these are being run at.
- Higher voltage parts with same specs might be better
- Does PS stay on all the time? Power strip to shut off may help.
- CapXon KF series, 1000 uF, 16V specs
- Size 10 mm (dia) x 20 mm (height)
- Ripple 1350
- Impedance 0.065 ohms
- Lead pitch 5 mm
- Panasonic equivalent is EEU-FR1C102
- Got new part in three days.
- Installed - make sure stripe marked on PCB goes to ground (-) side of cap.
- Put plastic shield under the PCB.
- Attach PCB to base.
- Attach ground wire. I forgot and had to disassemble.
- Screw in the power plug. It sits "weirdly" straddling in front of the metal plate which has threaded holes.
- Put LCD into back.
- Attach wire to bezel.
- Screw back to front. Only 2 screws seems weak to me...
- Result:
IT WORKS!!!
Fix a Sceptre LCD Monitor
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Comments (1)
MrTundraMan said
at 11:51 pm on Jan 21, 2011
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