BERLIN/MILAN, March 17 (Reuters) - The supervisory board

of ProSiebenSat.1 has put on hold a potential deal

that could hand U.S. private equity firm General Atlantic a

minority stake in the German broadcaster, sources told Reuters

on Monday.

General Atlantic is a co-investor in ProSieben's internet

units - price comparison website Verivox, perfume e-retailer

Flaconi, and online dating platform ParshipMeet Group - which

the TV group is looking to sell.

ProSieben said earlier this month it was working on a deal

to buy the U.S. firm's minority stakes in ParshipMeet and in

NuCom Group, the holding company housing Verivox and Flaconi,

using as payment a mandatory convertible bond it would issue.

But ProSiebenSat.1's supervisory board on Sunday did not

give the required support to the potential deal with GA and

asked for the management to seek a renegotiation under different

terms before reassessing it, according to the sources.

The deal with General Atlantic would make ProSiebenSat.1 the

sole owner of the digital assets, removing an obstacle to the

proposed sales of Verivox and Flaconi, which General Atlantic

has the power to block currently.

A key issue scrutisined by the supervisory board was the

terms of a so called "contingent" capital increase, an option

allowing the company to issue up to 23.3 million shares, or 10%

of its share capital, the sources said.

The contingent capital option would dilute the stakes of

ProSieben's existing shareholders, including top investor

MFE-MediaForEurope, which holds nearly 30% of

ProSieben, just below the threshold that under German laws

triggers a mandatory bid.

ProSieben, General Atlantic and MFE declined comment.

MFE, controlled by Italy's Berlusconi family, has secured a

3.4 billion euro financing package to fund a potential takeover

of ProSieben, which it could launch later this year under a push

to build an ad-funded European broadcaster.