Hubble Telescope’s payload computer is down. NASA has spent days trying to fix it. – USA TODAY

The Hubble Telescope's payload computer is broken. NASA has spent over a week trying to fix it. USA TODAY

NASA has spent more than a week trying to fix the Hubble Telescope's computer hardware issues.

The problem: a1980s-era payload computer, which is supposed to control and coordinate scientific instruments aboard the spacecraft and monitor them for health and safety purposes, stopped working June 13, according to a NASA statement.

"After the halt occurred ... the main computer stopped receiving a keep-alive signal, which is a standard handshake between the payload and main spacecraft computers to indicate all is well," NASA said in the statement.

The payload computer is part of the Science Instrument Command and Data Handling module, which was replaced in 2009 during the last astronaut-servicing mission to Hubble, which launched in 1990.

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The main computer has put all the scientific instruments into safe mode. An attempt to restart the computer the next day failed.

Further attempts to switch to a backup memory module and obtain diagnostic information on both modules also failed.

The Hubble Space Telescope has captured astonishing images of deep space, such as the trailing arms of NGC 2276, a spiral galaxy in the constellation Cepheus, 120 million light-years away from Earth.(Photo: -, ESA/HUBBLE/AFP via Getty Images)

The Hubble Space Telescope operations team told USA TODAYthat initial indications pointed to a degrading computer memory module as the source of the halt, but the team is still collecting data.

"The operations team will be running tests and collecting more information on the system to further isolate the problem.The science instruments will remain in a safe mode state until the issue is resolved," the statement said.

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Theteam told USA TODAY that the computer has on several occasions locked up or froze. In those cases,the computer has been restarted and normal science operations were restored.

"This is similar to your laptop periodically freezing and needing a reboot," the teamsaid, adding that there is not a firm timeline for bringing the computer online again.

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Hubble Telescope's payload computer is down. NASA has spent days trying to fix it. - USA TODAY