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I need a monitor to work on a old industrial machine it must be vga compatible
Problem for Monitors
Generic problem for all Monitors
LCD Monitor is black... blowing transistors
Product is a Benq FP931 19" Monitor
LCD power light is on and green (getting signal from the video card) but the screen is black. I can see my desktop when I shine a light onto it...
I took the monitor apart and nocitced 5 blown capacitors.. This leads me to believe that the backlights may be ok.. but will for sure when the capacitors are replaced.....
I replaced the capacitors and plugged the monitor back in. Immediatly one of the new capacitors popped, smoked and was leaking some stuff.... so Im sure that i need to test some fuses and transistors.. problem is, Im not exaclty sure which is for what and how to test properly.
Thanks for any help...
LCD power light is on and green (getting signal from the video card) but the screen is black. I can see my desktop when I shine a light onto it...
I took the monitor apart and nocitced 5 blown capacitors.. This leads me to believe that the backlights may be ok.. but will for sure when the capacitors are replaced.....
I replaced the capacitors and plugged the monitor back in. Immediatly one of the new capacitors popped, smoked and was leaking some stuff.... so Im sure that i need to test some fuses and transistors.. problem is, Im not exaclty sure which is for what and how to test properly.
Thanks for any help...
Comments:
Oct 02, 2008
- ok I may have installed it backwards.. honestly im not sure exactly what I am doing.. how can I tell which way is not backwards.. the caps i took out were 25volt 1000uf.... i made sure they were the exact same..thanks for the response
Solution #1
posted on Oct 02, 2008
Bulging or "blown" electrolytic capacitors are a common problem with LCD monitors. If you replaced them with correct parts (voltage rating) then one of two situations comes to mind:
1. Electrolytic caps are polarized, if you install them backwards they will blow quickly.
2. The voltage the circuit provides exceeds the rating of the cap. A 5 volt cap in a 12 volt circuit will blow quickly. The voltage regulation circuit may not be working.
Monitor Mike
1. Electrolytic caps are polarized, if you install them backwards they will blow quickly.
2. The voltage the circuit provides exceeds the rating of the cap. A 5 volt cap in a 12 volt circuit will blow quickly. The voltage regulation circuit may not be working.
Monitor Mike
Yes
No
This Problem Also Relates To:
HP f2105 (Metallic, Carbonite) 21" LCD Monitor
HP Compaq FS7600 17 in.CRT Conventional Monitor
HP HP w19 19-inch LCD Monitor.
HP Pavilion F1523 15" LCD Monitor
HP Compaq FP5315 (Black, Silver) 15" LCD Monitor
HP vp17 Monitor
HP vs19 19" LCD Monitor
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