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. cclla@suddenlink.net We can also do the repair for youif you are not confortaqble with disassembly of the ac power unit.

Posted on Jul 20, 2008

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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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