Question about Compaq TFT5000 15" LCD Monitor

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Power light blinks fast red

The unit was working, with a high pitch noise for some time. I transported the monitor and now it just blinks fast when i plug in power supply. The power button does nothing. I actually consider myself a amateur fixer guy and have another non working unit to swap parts. I feel like i have swaped all parts to no avail. What is wrong is it possible the power supply is to blame and not a board level problem?

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  • gdgonzo Dec 03, 2007

    I have the exact same problem , I open up the unit and have checked all the cables and the fuses. Everything seems to be in order,I will do a bit more testing later on , but so far I have no clue whats wrong.

  • jrskt Jun 03, 2008

    hehehe same problem here too, it works fine for couple days but with a little noise and after a while it just show a blank screen or fuzzy...i change the vga cable and it seems to work but the noise still. what is the specifications for a power supply? the one i have is input 100 50/60hz 91a and output dc 5v/2a , 12v/2.3a thanks



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Hello All,

The problem with the fast blinking power light is caused by 4 capacitors in the power supply unit going bad. We have been repairing this model for 4 or 5 years and this is a very common problem. We have a kit with all of the parts and directions available for $15.00 plus $2.00 shipping. Let me know if anyone needs the kit. We can also do the repair for youif you are not confortaqble with disassembly of the ac power unit.

Posted on Jul 20, 2008


Had the same problem, it was the Power Supply

Posted on Jan 30, 2007


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1 Blink SOS: This shutdown operation is usually caused by a lack of communication between the A and the D boards.
1 Blink SOS: This shutdown operation may be caused by the improper connection of a SS board connector to the panel.
2 Blinks SOS: Pin 87 of the MPU IC9003 monitors the 15V line. During normal operation, the transistors Q9053 and Q9054 output a high to pin 87. If the 15V line is missing or shorted, a low is provided to pin 87. As a result, the unit shuts down and the power LED blinks 2 times.
3 Blinks SOS: IC9807 is a 3.3V regulator located on the D board. Its output is monitored by IC9003. If the 3.3V is not present at pin 86, the MPU shuts down the unit. The power LED blinks 3 times.
5 Blinks SOS: Pin 85 of the MPU IC9003 monitors the 5V line. During normal operation, the transistors Q9051 and Q9052 output a high to pin 85. If the 5V line is missing or shorted, a low is provided to pin 85. As a result, the unit shuts down and the power LED blinks 5 times.
6 Blinks SOS: Pin 90 of the MPU IC9003 monitors the status of the SC board. During normal operation, the transistor Q6581 and IC6581 output a low to pin 90. If the SC board becomes defective, a high is provided to pin 90. As a result, the unit shuts down and the power LED blinks 6
6 Blinks SOS: 6 blinks of the power LED may also be obtained from pin 3 of IC9003, the DRV_RESET input. The D board provides the 5V source needed to power the C boards. On the C2 board, the 5V is routed back to the D board via connector C20/C10, C11/D31 causing pin 3 of IC9003 to be high. If 5V is not routed back to the D board, pin 3 of IC9003 goes low. The set goes into shutdown mode and the power LED emits 6 blinks.
7 Blinks SOS: Pin 93 of the MPU IC9003 monitors the status of the SC, SU, SD board. During normal operation, the photo-coupler PC6480 outputs a low to pin 93. If the SC, SU, or SD board becomes defective, a high is provided to pin 93. As a result, the unit shuts down and the power LED blinks 7 times.
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